ITEC 2019

UDT 2018 Seminar Programme

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09:10
  1. Theatre 1
    110 mins
11:00
  1. 60 mins
12:00
  1. 60 mins
14:00
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    ASW in littoral waters stresses all links of the weapon system functional chain, from sensor, via shooter to effector. Detecting and classifying submarines in the disturbed and complex hydro-acoustic environment is an arduous task, and once a confirmed target is found the time to engage is short. In just a few seconds the detection fades and the opportunity disappears. The complex environment puts specific requirements on the weapon system. The system must be capable of operating in shallow waters where hydro acoustic phenomena like reverberation and refraction is prevalent. Distances to targets and distances to friendly units can be short, and the water volumes can be very confined with limited space for maneuvering. This calls for a high degree of maneuverability and controllability. This paper focuses on specific design aspects that have to be taken into consideration when a new generation of ASW torpedo system for littoral waters is developed.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    Maritime Battlespace characterization requires the observation, analysis, prediction and mapping of environments, including natural and contextual underwater and surface parameters. While for open oceans and some well-studied regions solutions exist for NATO Military Oceanography and Rapid Environmental Assessment, there are no common alternatives for integrated stealth and secure characterization and Indication and Warning of potential targets and threats of remote areas and higher risk domains. CMRE programme Maritime autonomous networks for stealth and secure battlespace characterization€ addresses those challenges in studying future solutions providing Maritime Information Superiority. The approach consists on adaptively tasking a fleet of discreet platforms to provide observing, while securely integrating, interpreting and exploiting the collected information by means of mapping and forecasts of relevant environments and anomalies for Indication and Warning. This information is then to be used by NATO forces for both tactical and operational mission planning. An overview of this programme is given.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Our presentation will focus on the innovations and applications of piezoelectric ceramics in underwater defense acoustic sensors and transducers. The focus of our discussion will be on new ceramics based on biased and electrostrictive materials in addition to the most widely accepted PZT. Design features such as power handling capabilities, as well as material advantages for large array sonars will be presented. Within each of the three materials, the strengths and weaknesses of each will be outlined in relation to optimized sensitivity and directivity, both critical parameters of sonar design. Dielectric constants and loss factors can have drastic consequences on sensor design. These effects, both positive and negative, and their impact on performance will be discussed. Throughout our 35 year history, Sensor Technology Ltd has focused on the development of innovative piezoelectric materials and how they can impact the design of underwater sensors.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    As the market leader in non-nuclear submarines, thyssenkrupp Marine Systems applies state of the art modularization methods for the development of submarine platforms. The authors focus on the possibilities, restriction, and methods of modularization of submarines. Different levels of modularity in submarine design and construction are discussed. Modularity criteria and evaluations for submarine platform systems show the company's understanding and aims. A case study outlines the steps on the way to a highly modular submarine design. Starting with the enabling overall architecture of such a submarine, the paper provides illustrative examples how systems deal with a modular performance growth. The methods and tools used to manage and verify a multitude of design variants are discussed.
14:20
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    Currently, major navies study the possibility to replace thermic propulsion by electrical propulsion, in particular an Al-AgO Primary Battery. Safety associated with a high level of performance of Al-AgO Primary Battery have been demonstrated at sea. Naval Group is a leader of this technology since 30 years. As design authority, Naval Group has produced more than 1,200 Al-AgO Primary Batteries for LWT or HWT. These systems have been tested under operational conditions in different sea states and various seas and oceans (temperature, salinity…). Indeed, Naval Group Al-AgO Primary Batteries are fitted on all MU90 (in-service in 9 Navies), all the Blackshark HWT and the brand new F21. Naval Group has a long experience in the design and qualification of Electrolyte Management System (EMS): pump and motor minimizing flow noise, real-time monitoring of critical electrolyte species (conductivity, viscosity and temperature), efficient hydrogen gas-liquid separator, heat exchanger and thermal control.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    The future of manned submarines is questioned nowadays, as a result of rapid developments in autonomy in other fields (e.g. autonomous cars). Therefore, the feasibility of an unmanned submarine, basically a large unmanned underwater vehicle (UUV), as a replacement for a conventional diesel-electric submarine (SSK), was investigated. Characteristics (speed, range, payload capacity, autonomy) of a hypothetical generic 2027 unmanned submarine design were estimated using expert judgement to predict the state-of-the-art of critical technologies (energy storage, artificial intelligence, etc.) available in 2027. Next, the operational performance of this 2027 unmanned submarine was evaluated using a set of operations that reflect the operational requirements for an SSK. This evaluation showed that an unmanned submarine cannot replace the SSK in 2027. Smaller UUVs are, however, a valuable addition to an SSK.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Additive manufacture offers the potential of a step change to the design and manufacture of SONAR transducers. Techniques, such as direct metal laser sintering (DMLS), have the capability to generate metallic parts with highly complex geometries without the requirement of secondary processes. However, the utilisation of additive manufactured parts in dynamic systems, such as active SONAR transducers, is presently limited. This partially stems from the unknown performance of additive manufacture alloys when utilised in a dynamic system. This paper will demonstrate that it is possible to accurately model, using finite element methods, a SONAR-like transducer containing a DMLS part, before comparing its vibrational response to conventionally manufactured devices. The performance of a SONAR device, with parts fabricated through DMLS, will also be presented. In addition, a future vision of how AM may revolutionise future approaches to SONAR device design and manufacture will be outlined.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Traditionally submarine pressure hulls utilise domes as end closures. These are difficult to manufacture as they require precise double curvature to be pressed in thick steel plate petals, welding the petals together introduces further challenges. The structural strength of such domes is extremely sensitive to manufacturing shape imperfections; consequently they are subject to relatively high safety factors during design, and build tolerances in manufacture. This paper, building on previous novel end closure development work by the authors, presents research undertaken examining new novel pressure hull end closure geometries which do not require double curvature and are not prohibitively heavy. Finite Element Analysis has been used to examine the structural response and viability of the alternative end closures. This paper discusses the advantages and disadvantages of the different end closure options and overall viability of the concepts using the Wyvern® submarine as a developmental test bed.
14:40
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    Based on its past experience, former WASS, now Leonardo Defence System, has developed a€ vehicle for underwater applications. The initial application is the Mobile Target Emulator (MTE) in service with several Navies for self defence of Surface and Submarine platforms. Its upgrade has been developed applying the most modern techniques of System Engineering. The result is to have a common vehicle capable to host different payloads and in particular a new acoustic system to generate a Mobile Target Jammer Emulator (MJTE), an Acoustic Head and a Warhead to create a mini torpedo (LCW - Low Cost Weapon). The aim of the MJTE is to reduce the number of effectors for each reaction against an attacking torpedo, while the aim of LCW is to support the process of contact classification on low confidence contacts, without deploying LWT (Lightweight Torpedoes), also if more performing but more expensive.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    The recent development and operation of low-cost, robust, and highly COTS-integrated, extremely large Unmanned Underwater Vehicles (XLUUVs) as anti-submarine warfare training assets has spawned the development of strategic and tactically relevant, autonomous, undersea systems with substantial ASW, MCM, ISTAR and Area-Denial capabilities. Coupled with the rapid advance of sonar systems, machine automation and, learning, XLUUVs may be pre-positioned in theater, rapidly delivered via commercial or military transport, or self-deliver for strategic or tactical surprise; once launched they can loiter and provide persistent coverage, acting alone of as force multipliers. XLUUVs lend themselves to modular construction, and are significantly less costly than traditional marine assets, and their relatively small size and acoustic signature make them difficult to detect, particularly in the littoral environment. This paper will discuss recent developments and present a concept for system that is commercially now.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Strong, but thin, optical cables are a key component for many underwater applications such as ROVs, sensing systems and many DoD weapons systems. Non-Metallic strength members used in cable constructions range from materials such as extruded Liquid Crystal Polymers (LCP) to various aramid yarns. In many applications the cable is used as a communication link between discrete nodes deployed in the open ocean environment where the span can stretch from meters to miles. The cable may need to survive the constant forces of changing currents for days or even months. In this situation it is important to understand the dynamic strength but also the static strength of the cables. We will present data on the static vs dynamic strength of optical cables.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    The presentation of a new concept design for a naval submarine often has the control surfaces in an X-plane configuration. The justification for this over the traditional cruciform rudder and sternplane arrangements are based on arguments for improved manoeuvrability and higher fault tolerance. However, the implementation of the detailed design of the steering and diving control system and the safety case can mean that this level of manoeuvrability may not be achievable. This paper compares safe operational areas for a typical submarine with a cruciform and an X-plane arrangement, to demonstrate the impact of control surface arrangements. This highlights that the initial benefits in manoeuvrability identified by orientating the hydroplanes into an X-plane configuration can be more difficult to realise. However, whilst such benefits are possible, it can result in a considerable increase in the engineering of the system.
15:00
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    Thanks to its stealth, range and fire power, the F21 heavyweight torpedo gives client navies an unrivalled tactical advantage over all threat. Exploiting a range of innovations and advances in torpedo technology, a single F21 can knock out any surface combatant or submarine from very shallow to deep waters. The F21 complies fully with the demanding safety requirements applicable to nuclear-powered submarines. Regarding to the warhead insensitivity, this high requirement level is reached because the ammunition embeds live improved IM components such as an RDX/Al/AP cast cure substance for the main charge and PETN based thermal igniter. Moreover, its specific internal rubber based Thermal Protection gives some additional surviving characteristics against thermal threat such as external fire. IM assessment was performed according to a rigorous process. This paper will describe the design principles and focus on results obtained against full scale tests such as shaped charge test.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Interconnects with hull penetrations provide the essential links for the eyes (imaging optics), ears (acoustics), and nose (chemical sensing) of the subsurface ship. The dry mate connectors and interconnect cable assemblies offered today are much the same in configuration as the first connectors offered in the post war arena. Since that time, much has been learned about dry mate connector applications. Original designs tended to be power conductors and low bandwidth signal lines. Advancement in communication and sensing technologies are resulting in designs that require and incorporate higher power, higher frequency RF, Fast Ethernet and complex fiber optic sensing signals. This paper will present an overview and examples of the emerging developments, standards and testing of the latest interconnect systems for communication and sensing systems.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN

    Advances in lithium-ion technology are prompting great changes in the submarine battery arena. However the advent of pressure-tolerant lithium-sulfur batteries, developed initially for UAVs, could drive an even greater revolution in overall submarine design.

    This paper describes the major benefits achievable by placing main batteries outside the submarine pressure hull, as well as the key integration challenges.

    Externally mounted batteries free up valuable space within the submarine, and utilise buoyancy to reduce effective weight. They are also easily accessible for replacement, therefore offering improvements to submarine availability. The described Li-S batteries require little maintenance, and solve many of the safety issues displayed in traditional Li-ion designs.

    Using the BMT ‘WYVERN’ concept design as an example submarine, this paper investigates the impact of this novel concept from a whole-boat perspective. Submarine hydrostatics, arrangement, electrical system architecture, and DC protection arrangements are amongst the key elements considered.

15:20
  1. Theatre 3
    10 mins
    • WEAPONS AND PAYLOAD SYSTEMS
  2. Theatre 4
    10 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
  3. Theatre 2
    10 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    10 mins
    • PLATFORM DESIGN
15:30
  1. 30 mins
16:00
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
    DXC Technology is the Design Authority for the ANZAC Class Combat System Simulator (CS Sim) design, installation, and commissioning of 5 Shore Facilities around Australia. The ANZAC CS Simulator has been designed to train ships' Command Teams and to perform initial and through life Combat System Integration and Testing. The CS Sim is also used for CS Maintainer training, individual Operator CTT, On Board Training, Simulation collaboration and Coalition exercise using DIS interfaces. The ANZAC CS Simulator Architecture Principles are to: Interface with the Ship Fit Combat Management System, Simulates the ship fit interfaces for all of the Sensors and Weapons, Simulates the ship fit interfaces for Data link, Simulates the Internal and External Communication functionalities, Provide enough fidelity for Command Team Training, and use distributed computation environment: one for each equipment type (e.g. one per radar) or per function (e.g. DIS Gateway).
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    This paper will explore the integration of new autonomous technology into the GEOINT battlespace; how missions can be planned, launched, monitored and exploited across a range of parent platforms by utilising the existing NATO standards for GEOINT and Electronic Navigation. The paper will focus on how use of these standards would simplify the tasking and mission planning for the platform crew, remove unnecessary additional planning systems and enable the rapid sharing of data across force elements. It will provide a structure for the end to end conduct of autonomous missions, from concept to exploitation of the product in the GEOINT environment (for MCM, ISTAR, theatre entry and targeting). It will also examine how real time data transfer media can be used for on the fly reprogramming and mission updates. Whilst navigation and safety criteria can be applied to the mission plan for the autonomous vehicle.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    A body moving through a density stratified medium will leave a persisting turbulent region within which density fluctuations can exist at many scales due to perturbation of the stratification. Under favourable conditions such fluctuations lend themselves for detection against a relatively smooth quiescent variation in backscatter. This paper investigates the processing required to detect the effect of density fluctuations in the density dependent backscatter from the medium using an active sensor. In particular, the relative magnitude of detected fluctuations, on a scale comparable to the resolution cell size of the sensor, is investigated. Use of statistics of the backscatter amplitude against the average backscatter variation around the disturbance is exploited where the typical backscatter distribution is derived from observations of the region of interest. The detection of density fluctuations can have many applications, e.g. mapping of ocean thermal currents and vents, migratory patterns of undersea creatures, etc.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    With the increasing threat of powerful sonar systems, acoustic Target Echo Strength (TES) is a key performance to improve the stealth of naval platforms. TES performance of a submarine is directly related to the design of items such as hull and sail, steering gear, bow array, etc. The reduction of TES is possible with specific options acting on the contribution of outer and internal structures. Moreover, the use of acoustic coatings (Anechoic and Transmission-loss) is fundamental to achieve the best TES performance. Based on the BeTSSI generic submarine model, a parametric study has been carried on to illustrate the influence of design choices on the TES performance. To do this, BeTSSI model has been modified (steering gear type, sail shape,…) and numerical calculations have been realised on each configuration with ECHOPHY software. Finally, the impact of TES specific options is discussed and the combination of the best options is proposed.
16:20
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
    With the beginning of the 21st century it seemed that monostatic sonar sensors such as Variable Depth Sonars (VDS), Hull Mounted Sonars (HMS), Dipping Sonars or even Sonobuoys and Diver Detection Sonars (DDS) reached their physical limits and the new focus in research and development shifted to processing, interoperability and the interconnection of multiple sonar sensors, whether inboard or off-board, into one Underwater Warfare System (UWWS) incorporating all the different sensors and weapons used for ASW. With all the different sensors, a shift from independent systems to a comprehensive integrated UWW suite is inevitable. The modern challenges in ASW can only be achieved by following a “system of systems” approach in which all available sensors and weapons are combined together with a control system dedicated for underwater warfare to form an ASW suite as an add-on to a common Combat Management System (CMS).
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    The ability to integrate unmanned systems is becoming more seriously considered into underwater and submarine capability of the future, this is in no doubt, but this is also true of current in-service platforms. It is unlikely that a rapid integration of these unmanned systems will happen, what is more likely that these systems and indeed other external assets that make up the broader offboard systems used by a submarine, will become an evolutionary capability to existing submarine combat systems. Looking to the future, there is opportunity to think very broadly around how the military needs to conduct underwater warfare; this will see a revolutionary way in which underwater systems supplement submarine capability. However, this paper will examine how new capability can complement the existing submarine combat system. The paper will therefore examine what kind of architecture is required as part of a Common Combat System approach.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Innovation continually transforms the subsea industry, inspiring the development of new technologies for the increased efficiency of offshore energy operations, but why should these innovative solutions be reserved for only oil and gas? Subsea surveys and inspections currently performed in the defense industry typically involve complex calibrations, significant risks to personnel, and time-consuming controls to ensure position and data accuracy. However, 2G Robotics' underwater laser scanners improve the accuracy, precision, safety, and cost of subsea operations. 2G's systems are easily deployed by unmanned vehicles and generate 3D models with sub-centimetric resolution allowing for the comprehensive assessment and categorization of a target. The 3D models function as detailed dimensional records and provide an accurate baseline from which changes in an environment or asset can be monitored. By examining 2G's systems and their resulting case studies, this presentation will address how dynamic laser scanning can improve the efficiency of subsea defense operations.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Acoustic tiles represent a key technology for the acoustic stealth and discretion of submarines, considering two types of concepts: microvoid or macrovoid (Alberich) solutions . The purpose of this presentation is to give an overview of the process used at Naval Group for that technology, from requirements to the control of performances. The acoustic performance is expressed in the form of transmission and reflection coefficients or derived parameters. Non acoustic performances, such as compressibility and fire resistance, have also to be taken into account in order to allow the integration of the material on the hull and to fulfill the submarine architectural requirements. Naval Group ensures the design of the tiles and specifies its realization by suppliers. The verification of materials characteristics in the design stage and of the functional performances of the tiles are verified using specific devices or methods, some of which will be presented.
16:40
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
    Over the last three decades Mine-Countermeasures (MCMs) have evolved together with the technological evolution of mines, platforms and sensors. Old wooden Minesweepers, with their basic outfits, have been gradually replaced by modern Minehunters, featuring hulls in composite materials, very low magnetic and acoustic signatures, high resistance to underwater explosions and technologically advanced Combat Systems. There is now broad consensus across Navies about the way in which MCMs will be executed in the near future, i.e. by means of unmanned and autonomous systems operated from more conventional motherships standing off from the minefield. However, several trade-offs need still to be considered and operationally tested before clear ways ahead are defined and agreed. Thanks to its lasting experience within MCM, Leonardo offers Minehunters solutions that are characterized by very high levels of integration: within C/S, between C/S and Platform, between the Ship and the rest of the Fleet, with UxVs extensive use.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    Many European nations will replace their current maritime mine counter measures (MMCM) capability soon. For their new MMCM capability, many different operational concepts are considered. They include both MMCM platform concepts and unmanned systems. The latter will become increasingly more important, either as force multiplier or as core capability. To gain insight in viable operational concepts, tooling has been developed (HOLON). HOLON simulates and enables analyses of operational effectiveness of system concepts and corresponding courses of actions in multiple scenarios. The simulation results provide a clear perspective on the operational (im)possibilities of different design choices and can assist in determining the appropriate requirements. HOLON supports the user in an iterative workflow that includes the design of concepts of operations, development of scenarios, simulations and analyses. HOLON is currently being applied to support Dutch MoD Alkmaar class MMCM vessel replacement project and within EDA MMCM-NG to support business case development.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Underwater Optical Wireless Communications are of great interest for military, industrial, and scientific applications. However, radio frequency (RF) signals require large antennas and cannot travel any meaningful distance in seawater due to high attenuation. Acoustic data rates are limited (kb/s) while their low propagation velocity can cause out-of-phase signal detection. Therefore, the employment of lasers and GaN-based LEDs operating in the blue-green region, where water exhibits a window of reduced absorption, enable transmission of data up to Gb/s for mid-ranged distances (<100m). These light sources, can also be employed not only for illumination and communications but for applications in underwater imaging, ranging and steering. Photo-Multiplier Tubes, Silicon Photomultipliers and Photon Avalanche Detectors can provide high gain and high SNR and are commonly used for optical waves detection. We report here on recent progress in transferring advances in high-data rate visible light communication over free space into the underwater domain.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    This paper presents a series of numerical simulations of a blunt trailing edge hydrofoil test case based on published results from experiments in a water tunnel. The key result (relevant to this work) was to provide an example of the lock-in phenomenon which is believed to be the cause of blade singing. The simulations were undertaken using the commercial Computational Fluid Dynamics package Star CCM+. The unsteady Reynolds averaged Navier-Stokes solver was able to accurately predict the shedding frequency at the hydrofoil trailing edge for a wide range of freestream conditions. Using the Fluid-Structure Interaction capability (coupling the CFD solver to a Finite Element stress solver) Star CCM+ was also able to accurately predict the lock-in frequency. Other evidence includes: • An order of magnitude increase in hydrofoil deflection during lock-in, • Increased coherence in the wake of the hydrofoil. This simulation methodology is now being used to analyse more representative geometries.
17:00
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    While UUVs can accomplish fairly long mission durations of around 8 hours, they also require a similar length recharging period and have long set up times of around 2 hours. Factoring in this downtime, combined with restrictions on which assets are available for deployment at any given time, can result in a complex calculations being needed to plan a clearance operation. Software has been developed with the core capability transforms large operational areas into multiple, smaller sections based on operator constraints such as maximum surface area or number of vehicles available. More vehicles in the water, optimized to spend more time in-mission to complete increasingly complex operations. This presentation will discuss how software can be used to optimise UUVs for large area deployments so that operators are less tied up with the logistics of planning the mission and are more able to focus on decision-making.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
17:20
  1. Theatre 3
    10 mins
    • OPERATIONAL DRIVERS
  2. Theatre 4
    10 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
  3. Theatre 2
    10 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    10 mins
    • PLATFORM DESIGN
17:30
  1. 0 mins
09:00
  1. Theatre 1
    30 mins
09:30
  1. Theatre 1
    60 mins
10:30
  1. 30 mins
11:00
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    Covert deployment of Autonomous Underwater Vehicles (AUVs) from Submarines is a key operational requirement for future navies. Discussions have tended to focus on ‘Concepts of Operation' and ‘Launch and Recovery', but significant challenges in terms of layout and configuration of the host are yet to be overcome. In 2011, BMT published a Vision for Future Host Submarines; BMT is revisiting that vision, incorporating it into its WYVERN SSK and specifically the challenge of recovering multiple AUVs across the air-water boundary and into the pressure hull. This would thereby enable internal maintenance, re-rolling and storage. This design approach incorporates the technology through the use of a Hull-Plug, minimising the extent of design change imposed on the existing platform. BMT aims to demonstrate the design challenges of an AUV Hull-Plug, and to relate those challenges to Submarines of different sizes for discussion with the submarine community.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    The proliferation of intelligence, surveillance and reconnaissance (ISR) information derived from unmanned and autonomous undersea sensors is radically changing the landscape of defence and security. The operation of these systems and the analysis of the information they capture -- happens in a secure command and control centers. The current focus of the design of these advanced operational command centers is Achieving Instant Situational Awareness,€ providing a full, immediate and accurate picture of the undersea theatre. In this session, you will learn how to: Implement a flexible and secure Unmanned/Autonomous operational control infrastructure, including realistic training and simulation options that accelerate competency. Achieve information superiority and instant situational awareness through immediate access to critical video and data resources Simplify management of multiple classifications of data through a single IA (information assurance) approved secure infrastructure Increase the centers' cyber security profile, while mitigating the threat of intentional or accidental breach by insiders
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Conventional submarines use a diesel-electric power plant. With modern battery technology the roadmap for total battery powered submarines seems feasible. Changing the conventional diesel electric powered submarine to a total battery powered submarine could enable more benefits than one might think. The creation of an entirely battery powered submarine will influence multiple submarine systems. A total battery powered submarine leads to less complicated platform design, but what would be the disadvantage? This paper gives an insight on total battery powered submarines. Presenting the advantages and disadvantages of both power solutions.
11:20
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    Following on from Babcock's 2015 paper, €˜What is the New Ocean Interface to complement the 21€ Tube?' this paper provides an update on Babcock's development of multifunctional Vertical Payload Tubes for future submarine platforms. Submarine Vertical Payload Tubes provide a flexible platform-to-ocean interface that can accommodate payloads for vertical launch and other operations. Supporting capabilities including vertical missile launch, unmanned underwater vehicle launch and recovery, and Special Forces deployment provides a submarine platform with a true ˜swing role' capability. This paper introduces the Modular Payload Canister, which when used in conjunction with Babcock Middleware allows for a single launch system that can accommodate any compatible payload. From a deployment perspective, such flexibility means that the submarine role can change from mission to mission, as required. Given that the capability is accommodated by the Modular Payload Canister, the platform-mounted system is future-proof to new payloads and capabilities throughout its service life.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    A Safety Critical Analysis for an Underwater Detection and Tracking System Verification and validation of the unmanned underwater platforms or weapons by tracking them is a difficult problem due to unavailability of GPS signals underwater. Because most of these underwater systems are safety critical, their test systems and environments must be safety critical too. So it is essential to apply several safety critical analysis to the test system too. In this paper, the safety critical analysis like Hazard Analysis, Functional Failure Analysis, Failure Modes, Effects and Criticality Analysis and Reliability Analysis applied to an Underwater Detection and Tracking System is described.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    The acoustic signals, detected in the underwater environment and especially along the main ships traffic lines, are often affected by noise and distortions that could make the classification by an operator difficult at a glance. Furthermore it will takes some minutes to analyze all the data coming from a single sonar target (narrow band analysis, demon analysis, broadband analysis) in order to classify it in a reliable way and in a multi-target scenario this could lead to the non-valorization of some target of interest . Therefore in these cases it could be useful to have a decision support software able to recognize peculiar acoustic features of the different naval vectors in order to automatically classify targets, helping in this way the operators to focus their attention only on valuable targets. The automatic detection and classification of targets could also represent a first step in the implementation of data collecting logics onboard UUVs.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    A new generation battery for SSKs must combine high density of energy with reliability and maintainability. Lithium-iron-phosphate (LFP) batteries, combining high performances and working safety, are the most suitable for SSKs propulsion among other Lithium-Ion chemistries. MoD's been investing to design and prototype a combat-ready€ LFP string and its Battery Management System (BMS).
11:40
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    As part of Babcock's development programme for submarine payload launch, an electromagnetic launch system has been developed. Simulated and experimental work has been undertaken to demonstrate the capability and compatibility of the launcher for use in a marine environment. The key focus of the work is on the ability to launch a payload of a certain mass at a given exit speed, while ensuring the electromagnetic field generated within the payload area remains within applicable standards. Finite element modelling techniques have been used and an experimental test rig has been built employing bespoke measurement equipment and data analysis. The solution focuses on the objectives of developing a scalable, multifunction launch system that is inherently safer, for both personnel and payload, and more robust than current systems. With improved operational capability and significantly lower through-life cost, the launch system can be tailored to support the advance of electric ship and boat.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    The ability of unmanned surface vehicles (USVs) to deliver effect across a multitude of roles has increased significantly over the last 3 years with the advancement of autonomous capability. Coupled with events such as Unmanned Warrior 16, there has been an increase in the appetite of navies to adopt unmanned systems to fulfil operational tasks within the next 2-3 years. However, while the sophistication of these systems is growing exponentially, are these unmanned vehicles ready for the operational environment? Can the security of USVs, including security of hardware, control and data links, manage the threat from a peer adversary and will the legal operating framework be robust enough to support the application of these assets across the full spectrum of modern naval warfare? ASV Global, a world leader in autonomous systems will explore these questions using their own safety case history while looking to the future within the defence sector.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    As the number/capability of sensors expands, increasingly the limiting factor is the human processing capacity. In mine-countermeasures, this problem is compounded by the nature of the targets with cluttered, complex backgrounds. One solution is automated image recognition but to be effective this usually requires extensive pre-training and frequently there is insufficient imagery to fulfil this need. This problem is not unique; in astronomical imaging, exploring deep space, terabytes of data are produced daily with literally billions of galaxies but limited training data and few trained operators. ATLAS ELEKTRONIK UK Ltd identified this synergy and their scientists worked with the University of Hertfordshire to adapt an algorithm, originally developed for the Hubble Space Telescope, to analyse sonar imagery. It uses innovative techniques to identify and remove background clutter before presenting a hierarchy of contacts. In trials, it proved highly effective, taking no longer than traditional software but crucially needing no supervision.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN

    Safety is our first priority.€€Since 2008, TOSHIBA has been supplying SCiB™ lithium-ion batteries as energy storage solutions for automobiles, ships, railways, EV-buses, elevators, Battery Energy Storage Systems for power grid.€€The cells inside these systems have been operating throughout the world without a single defect and this record is still continuing presently.

    TOSHIBA has been supplying two types of SCiB™ lithium-ion battery cells.20Ah and 23Ah class cells as high-energy type, and 2.9 Ah and 10Ah class cells as high-power type. 10Ah high-energy type cells begun mass production for automobiles in 2017. This high level safety design of SCIB™ cells which is based on the cathode material level is expected to be compatible with requirements of Power & Energy storage for submarines. SCIB™ cells also have superior cycle life characteristics and low maintenance features which will provide a striking effect on reducing through life cost.

12:00
  1. Theatre 3
    20 mins
    • WEAPONS AND PAYLOAD SYSTEMS
    The same oceans that facilitate covert submarine platform operations also present a communication challenges. Radio waves typically used for communication do not penetrate seawater to the depths that platforms prefer to operate at. To combat this challenge, towed buoy systems have been developed to allow the platform to remain at a safe depth whilst making provisions for an antenna at a shallow depth. To assess operational performance of such a system, Babcock has developed a towed buoy simulation toolset to model 6 degrees-of freedom buoy dynamic behaviour. Additionally, a numerical analysis toolset has been developed to analyse buoy performance during time history simulations across varying sea states, platform depths, speeds and headings. This paper details how the toolset can be used to develop communication buoy technologies.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING

    Modern, quiet submarines have become increasingly difficult to detect using conventional ASW techniques and constitute an evolving and more dangerous threat.

    In order to secure maritime borders and offshore assets from hostile neighbors, as well as maritime trade routes from pirates, terrorists, and other threats, a new Concept of Operation (CONOP) needs to be established. This new CONOP employs a layered defense involving multiple manned and unmanned assets. A solid ASW defensive strategy can be effectively performed by small-unmanned aerial vehicles (UAV) in combination with manned platforms through new ASW technologies that combine a dipping sonar, up to 64 state-of-the-art sonobuoys with distributed processing, and Multi-Static processing of all possible detection paths.

    Due to their long endurance capability, the UAV could act as a relay of sonobuoy data to manned assets beyond line of sight, and can provide on-board processing to reduce the ASW requirements of other platforms. The benefits of this application will be to increase patrol area size and area coverage while reducing platform-operating costs.

    Miniaturized sonobuoys are being developed, together with a light acoustic processor and receiver unit that are all optimized for carriage and deployment from UAVs.

    Additionally, a Multi-Static Active System (MSA) enhances the detection of submarines by using a field of active and passive sonobuoys, and active dipping sonar – all controlled and monitored by an airborne processing suite.

    The MSA tracking and identification methods are designed to reduce operator overload, increasing system effectiveness, while maintaining crew size. In today’s complex underwater scenarios, a strongly integrated ASW capability including different platforms and processing techniques is the recommended solution to ensure freedom of manoeuver and deny the enemy effective use of their submarines.

  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Lead-acid battery technology, even with its drawbacks in power and energy density, has survived a century as a source of stored energy for main propulsion or as stand-by batteries for submarines. Howe ...
12:20
  1. Theatre 3
    10 mins
    • WEAPONS AND PAYLOAD SYSTEMS
  2. Theatre 4
    10 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
  3. Theatre 2
    10 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    10 mins
    • PLATFORM DESIGN
12:30
  1. 60 mins
13:30
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
    The introduction of COTS based Open Architecture Combat Systems on SSNs operated by the RN, and other world navies, has been revolutionary. It has dramatically reduced the cost of inboard electronics and made the Combat Systems more open allowing faster capability insertion. To date this Open Architecture and COTS technology has not been extensively used in deployed SSKs, as the cost savings from cheaper hardware have not justified the development costs. However, with the considerable experience of using COTS on SSNs, the development costs are reducing and the financial case for fitting to SSKs can now be made. This could drive a revolution in underwater affairs as SSKs become more easily updated and dynamically reconfigurable allowing their capability to be rapidly adapted to a changing underwater battlespace. This could drive much faster introduction of technology and capability into the underwater battlespace, to the point where revolution becomes the new evolution.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    Future Naval Mine Countermeasures will undergo a transformation from a dedicated platform approach towards usage of unmanned off-board assets taken from the MCM toolbox. Ideally a mothership which remains off the mine field deploys modular capability hubs of USV-like size carrying MCM assets which allow for a single-path-detect-to-engage task. Atlas composed such set-up through combining its USV ARCIMS with the AUV SeaCat equipped with a high resolution synthetic aperture sonar for detection and classification of small underwater objects. A smart automated target recognition processing enables the system to continue in-situ decision making topped off by a subsequent launch of the mine identification and disposal system SeaFox, operated from a remote command station. Besides sticking to the principle of keeping the man out of harms way the overall system design consistently pursues the objective to stay highly efficient, i.e. highest classification area coverage output per unit of time with lowest staffing.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Multi-Static Sonar is one of the key concepts behind the drive to the hoped for revolutionary gain in underwater sensing capability. But often the potential gains from this technology are misunderstood or misrepresented. Multi-Static Sonar consists by definition of a synergetic combination of two or more dispersed sonar systems. It can be systemized in the physical realm by sonar system number, type and distance as well as in the data real by the degree of inter-system collaboration. But the actual tactical gain as the central factor that motivates this technical pursuit merits discussion as well. Quantitatively every ASW actor seeks more sensor range and area coverage. While Multi-Static Sonar does provide some benefit here its key effect is qualitative as it enables lower false alarm rates and quicker classification. These benefits in turn are needed to counteract the coming underwater threat evolution.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Conventional submarine technology has been in development since the early 1900's and today is widely accepted and utilised. The battery groups which are charged with the current obtained from an air dependant generator set, provide the necessary propulsion power to the electric motor to drive the impeller in submerged state. This necessitates running the main machines to recharge the batteries, which means surface cruising or snorting for a submarine; but also means degrading the stealth by vibrations and radiated noise, thermal traces and visual/radar detection risk. Utilizing the developing battery technologies enhances the energy storage to a considerable rate but rises some question marks like range, endurance, reliability and cost. Elimination of a modern conventional submarine's propulsion and auxiliary systems and replacement with high-capacity batteries is being studied; e-submarine characteristics, binary comparisons, advantages and disadvantages obtained by this theoretical conversion are evaluated. The resulting buoyancy, weight, cost differences are compared.
13:50
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
    On 1997, during UDT conferences, was discussed the importance of having an integrated combat system able to elaborate and display a clear tactical situation. The paper explained how SUBTICS® was meeting the related requirements. After more than 20 years of evolution and more than 40 systems in service, we are facing new challenges on data processing, new generation operators, and cybersecurity. The following paper discusses how to face those new challenges, considering: Data processing: the evolution of the technical infrastructure towards a ship level digital infrastructure, coupling combat system, platform management system, and ashore maintenance, New generation operators: the use of state of the art MMI technologies, more intuitive and user friendly, adapting MMI layouts according to the ongoing submarine operation. Cybersecurity: the integration of naval group cybersecurity management solution based on state of the art technologies tailored to submarine specific applications.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    This article presents an innovative implementation of heterogeneous Autonomous Underwater Vehicle (AUV) missions in the mine countermeasure (MCM) context. An area is surveyed by a first AUV and a second phase is conducted by another vehicle to identify a potential dangerous object selected from the first survey. This article is focused on the second phase and explains the new concept of Vehicle Adapted Registration Map (VARM). A first VARM based on the survey data is converted in a second VARM according to the characteristics of the second AUV. A main difficulty is the degradation of the proprioceptive and exteroceptive sensors of the second AUV. We propose in this article a path finding method based on VARM to guarantee the revisit of the selected object. This path ensures the revisit of intermediate sets in the VARM to reduce the vehicle pose uncertainty by using interval analysis and minimizing a cost function.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Navies are under pressure to maintain their ASW capability with potentially fewer available assets & personnel. However, novel technologies and algorithmic advancements allow the optimization of curre ...
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    For oceanic submarines, the on board hydrogen production using reforming process have been foreseen as a solution in order to avoid an impact on submarine weight and displacement due to hydrides stora ...
14:10
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
    With commitment to the ASTUTE and DREADNOUGHT submarines the UK will require suitable underwater weapons until at least 2060 and potentially beyond with the Maritime Underwater Future Capability. In that time the tasks that submarines undertake will evolve, as will the threat and perhaps even the environment. In this joint paper DSTL, the UK MoD's Science and Technology delivery organisation, will first explore a range of potential driving influences and how these are likely to shape future underwater weapon Requirements. BAE Systems Maritime Services and Atlas Elektronik UK will then build on DSTL's outline to discuss the industry view of system implications and investigate the technology opportunities, particularly those driven by commercial applications, which may be matured within suitable timescales to meet such Requirements.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    Due to the diversity of mine types currently in use and the potential threat of future mines, an MCM system must be flexible enough to handle many different situations. The Saab MuMNS can be loaded with up to 3 charges, each of which can be configured by the EOD team before usage. Pre-filled disposal charges offer convenience, while user-filled immunisation charges can be tailored according to the situation. Both charge types can be assembled on the MuMNS prior to mission start. The system can be used confidently at varying depths, currents and sea states – ensuring that the majority of threat environments can be secured. This paper details the operational concepts and safety benefits of the Multishot Mine Neutralisation System.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    The most conventional active sonar setup is known as Pulsed Active Sonar (PAS) which emits a short-duration signal and waits for echoes. PAS imposes a low repetition rate due to the duty cycle constraint. Combined with low resolution range measurement, this may not be sufficient to perform an accurate tracking operation. Continuous Active Sonar (CAS) provides a higher repetition rate. Furthermore, transmitting a Binary Phase Shift Key (BPSK) signal allows a Doppler measurement which adds an additional observable dimension. The goal of this paper is to highlight the major role of the Doppler information combined with a high repetition rates in tracking performance improvement. Our recent work demonstrates that the estimation filter presents a higher convergence speed when Doppler information is added to the prediction model input data. The evaluation of the performance of the overall system will be illustrated with data collected during a sea trial.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    A naval submarine has to cope with different operational modes: sailing surfaced, at periscope depth or submerged. Therefore it needs an appropriate power plant. The impact on the overall design is significant. A well-balanced selection of the components of the power plant in an early stage is therefore key to a successful design. A first principle power plant model is extended with a PEM Fuel Cell operating on pure hydrogen as Air Independent Power (AIP) system and a Permanent Magnet Synchronous Machine as propulsion motor. The model covers energy generation, storage, distribution and propulsion elements. It enables optimization of a submarine power plant to balance the required space, mass and operational performances. Different configurations (mix of Lead acid or Li-Ion battery, Fuel Cell AIP, compound or permanent magnet motor) were assessed, resulting in the most profitable design concept considering volume, mass and efficiency ultimately cost given the required operational needs.
14:30
  1. Theatre 3
    20 mins
    • OPERATIONAL DRIVERS
    The paper will take an objective view of evolutionary and revolutionary changes in the naval/underwater sector and will contend that technology, technological change and engineering developments are fundamentally enabling by nature and so are not drivers of change per se. The paper will discuss the considerations affecting the introduction of change in complex systems and programmes including the importance of timing, the need to balance risk on developments, the management and phasing of funding and the complementary factors of operation and support that are part of meaningful planning. The key point is that in consideration of the actions or potential actions of competitors organisations choose to develop along revolutionary or evolutionary paths. The paper will include a review of how, as a large organisation, Babcock Marine addresses specific and general strands of technological change and the derivation of technical and programme solutions for themselves and their customers.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    The underwater Improvised Explosive Device (IED) represents a growing global terrorist threat for the maritime domain. The country units that has to deal with this threat are normally Police Forces and the Navy EOD teams. The operators in these teams are highly trained in handling IEDs on land. The tactical approach towards an IED is normally with remote tools and robotics when this is applicable and with manually approaches when absolutely needed. For handling land IEDs there are several robotics available on the market and many of these are globally used by todays Police and EOD operators. When it comes to the underwater environment there are few tools available for the EOD operators which means that underwater IEDs most likely will be approached manually by divers. To support these operators with a greater tool box for their hazardous tasks new robotics for underwater operations are developed and offered.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
14:50
  1. Theatre 3
    10 mins
    • OPERATIONAL DRIVERS
  2. Theatre 4
    10 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
  3. Theatre 2
    10 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    10 mins
    • PLATFORM DESIGN
15:00
  1. 30 mins
15:30
  1. Theatre 3
    20 mins
    • COMMERCIAL TECHNOLOGIES
    "ASW is often cited as a generic use case for UUVs. In order to deliver an ASW capability it is argued that a UUV will amongst other things, need to sense and make sense of its environment then respond autonomously to what it senses. The paper details work conducted over a period of 12 months and provides an overview of: Work to characterise the sensitivity of a COTS Thin Line Towed Array (TLTA). The work conducted to integrate the TLTA with a COTS UUV, and then to develop the necessary signal processing and autonomous behaviours to deliver a search detect and track capability. The sequence of trials conducted by QinetiQ to progressively demonstrate the ability of a UUV to search, detect and track a dived target and an overview of the results obtained. Before offering an assessment of the potential impact of the results and lessons learnt on the future use of UUVs. "
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    The rapid development of autonomous vehicles in recent years has outpaced tactical thinking and the development of novel approaches to their use and deployment. This paper will examine how these sophisticated and versatile platforms can be used to provide a completely new set of tools in Anti-Submarine Warfare, hitherto unimaginable and potentially game changing in this difficult environment. The future limit of how these devices can be employed and deployed is restricted only by our imagination. The expression "Force Multiplier" has been over and mis-used in the UWW domain for decades, however, AUVs have the real potential to deliver on that promise provided we can match the platform with a new and unique suite of capabilities.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Conventional submarines charge their batteries under snorkelling conditions. Short term snorkel closures and regionally varying wave heights and lengths significantly change the operating conditions o ...
15:50
  1. Theatre 3
    20 mins
    • COMMERCIAL TECHNOLOGIES
    For more than 30 years Saab has been developing advanced ROVs and AUVs. During the last years Saab Underwater Systems have been developing a new generation vehicles. These new vehicles are the SABERTOOTH, a hybrid AUV/ROVs that can be used both as conventional ROVs and as AUVs, depending on what the mission requires; the LEOPARD, a highly advanced electric work class ROV; and the AUV62, an advanced modular torpedo shaped AUV. This paper will present the development strategy that has made these vehicles commercially available. In addition, it will present the new Saab technology platform created by merging the Saab AUV and defense technology with the technology of the Saab Seaeye LEOPARD and the Saab Seaeye knowhow in the Oil and Gas industry.
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    This paper explores futuristic deployments of complex underwater payloads from a remotely piloted 'torpedo' as an off-board sensor vehicle (OBSV) from a system-of-systems perspective. Torpedoes will continue to form the backbone of anti-submarine and anti-ship warfare for generations to come. A benefit of electric propulsion is that it allows diverse speed versus distance/endurance' mission profiling. This flexibility coupled with stealth and agility can enable an OBSV to deploy other diverse forms of remote, autonomous or piloted payloads, the nature of which will depend on whether the high-value-launch-asset (HVLA) is an above or an underwater craft. Some payload examples considered are; (i) Solo/multiple mine-counter-measure (MCM) systems that stay in touch with the HVLA (via the OBSV) over an optic-fibre link, (ii) Short-range, small diameter, autonomous underwater ordnance, (iii) Unmanned autonomous hybrid drones which provide an over-the-horizon' water-air-water communications bridge for OBSV mission navigation/guidance, and can 'illuminate' targets for its payloads.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Thales has been involved in the innovation, development and deployment of submarine visual systems for over 100 years. Initially innovation came from improvements in optical designs, then from improvements in sensor technologies but the next leap forward in capability and performance will come from the application of advanced processing techniques, AI and the exploitation of multiple data sources. In this presentation Thales will: Outline on-going developments in the commercial sphere Provide an overview of how this is currently being applied in the military environment. Evaluate and speculate on how this could be applied/developed in the submarine visual domain to maximise capability and performance An associated issue that will be addressed is the human factors impact: How do we grow and ensure operator confidence with increasingly automated systems? What is the optimum way for the operator to interact with these systems including the possibilities presented by augmented and virtual reality?
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    The design of a submarine must be subjected to very restricted design rules that have to be applied during the design stage. There is a very high number of these rules, although most of them can be reduced to different measurements. These measurements have various parameters that give the different locations where the design rules have to be implemented. For any shipyard who designs submarines, having the option to impart the design rules that could help the user while carrying out their daily design task with a CAD tool, is a very high priority due to the great time needed to do the validation. Validation of design rules can take a variety of forms, including, when possible, the capability of preventing the user from endangering a design aspect that does not obey an associated design rule. This paper discusses and describes the adopted solution to be integrated in CAD Systems.
16:10
  1. Theatre 3
    20 mins
    • COMMERCIAL TECHNOLOGIES
  2. Theatre 4
    20 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
    Navies that conduct Anti-Submarine Warfare (ASW) will always being dependent on have realistic targets to approach. Conventional submarines are usually a limited resource for any navy and most likely are they tasked to do real operations instead of being a target for ASW training. The submarines are not only limited in numbers but also costly platform to operate. The possibility to use AUVs instead of conventional submarines would both save money, personal and operational resources. Today's highly skilled AUVs can operate for long time over long distances and have the possibility to mimic conventional submarines. Furthermore can they collect and track data at the same time as they operate as a mimic for conventional submarines. This means that they would be the perfect exercise tool for an ASW Task unit that would have both a target and an evaluation tool for real feedback after the exercise.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    BAE Systems has researched an innovative algorithm based on Machine Learning (ML) and Natural Language Processing (NLP) to automate the integration of sensors of opportunity to command and control (C2) systems as a Phase 1-winning submission to the Defence and Security Accelerator Challenge Revolutionise the Human Information Relationship for Defence. This effort was inspired by Unmanned Warrior 2016, the unprecedented scale and pace of unmanned vehicle (UXV) integration seen at that event, and the Royal Navy challenge to see such agility in the hands of its officers. This presentation will discuss some of the innovative techniques deployed and the novel and transformational opportunities afforded by such technology.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    The growing adoption of UUVs and their rapid escalation in capability is expected to have a disruptive effect on the underwater battlespace. A current challenge for maritime capability planners is to assess the benefits, challenges and threats associated with a range of novel and divergent operational concepts e.g. a nuclear submarine versus a fleet of UUVs. This paper presents an approach for how dynamic modelling in a Model-Based-Systems-Engineering context can be used to evaluate high level parametric models of operational concepts during the solutioneering phase of underwater capability planning. A model based approach will be presented which simulates a range of concepts against operational vignettes and evaluates the effectiveness of each against capability requirements. The models are also used to explore the design trade-space to identify how an improvement in key enabling technologies might alter the overall effectiveness of a concept, enabling the capability planner to target future resources accordingly.
16:30
  1. Theatre 3
    20 mins
    • COMMERCIAL TECHNOLOGIES
    Minesweeping has a long history of use as part of a mixed mine countermeasures (MCM) capability, complementing mine hunting  in difficult environments. The modern move by several nations is towards a ...
  2. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
  3. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Babcock International and the Ministry of Defence have been working on how Model Based System Engineering (MBSE) can be used in the design of complex engineering solutions, including submarines, and utilising the NoMagic CameoTM software. In this paper we discuss how, through MBSE, we in theory could design a Submarine without drawing a submarine. These tools help us understand how systems of systems interact with each other through multiple levels of complexity and detail, encompassing whole boat scenarios down to component level instances, and by developing a consistent modelling framework we can reuse and reutilize this template for future projects. From this the Cameo tool provides a Launchpad to develop parametric models, construct what-if scenarios; specifying failure modes and system behaviours in different user defined scenarios, as well as providing outputs to influence and optimise overall system design and future design development.
16:50
  1. Theatre 3
    10 mins
    • COMMERCIAL TECHNOLOGIES
  2. Theatre 4
    10 mins
    • AUTONOMOUS AND UNMANNED SYSTEMS
  3. Theatre 2
    10 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    10 mins
    • PLATFORM DESIGN
17:00
  1. 0 mins
09:00
  1. Theatre 1
    90 mins
11:30
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
    Modern Naval Operations require a high level of maritime domain awareness based on the fusion process of local and remote real time surveillance, intelligence and reconnaissance systems. The ability to create a complete and distortion-free, high-resolution situational picture in real time is a key capability to be provided by command and control systems. Any misinterpretation of data, missing integrity or security breaks may result in confusion instead of fusion leading to mismanagement instead of management. In other words a failure in the fusion process may disturb the command and control chain with possibly severe consequences for the mission goals of the operation. The presentation will address the complete fusion chain of the Joint Data Laboratory Model ranging from technical to cognitive level with a focus on the challenges, opportunities and risks of the integration of “big data” and artificial intelligence in military C2.
  2. Theatre 4
    20 mins
    • COMMERCIAL TECHNOLOGIES
    The Communications Office is an expensive, physically complex area of the submarine that drives in significant acquisition and configuration control challenges throughout the life of the programme. This complexity has induced a self-defeating cycle where by an ever increasing number of requirements are employed to technically assure the non-functional aspects of often partially characterised COTS equipment. The future operational climate is expected to demand rapid changes to capability configurations in order to facilitate mission specific requirements. If a physically stove-piped approach to communication systems architecture is maintained, it is unlikely that the space and programme constraints will be sustainable. This paper will focus on how communications system integration could capitalise on emergent commercial technologies to converge the physical architecture to a point where by external communications could be viewed as a simplified and adaptable service available to general combat systems operators, rather than a discrete complex system requiring specialist operation.
  3. Theatre 1
    20 mins
    • PLATFORM DESIGN
    The levelwinding, or spooling, of multi diameter cable configurations, such as tow cables / arrays, with their various transition points and electronic modules onto handling systems has always been challenging. Recently multi-static sonars that incorporate their vertical aperture projector into the receive array have revolutionized multi tows into a single tow. This presents many advantages for the operator. However, this makes level winding the combined payload onto a single winch almost impossible. This paper shows how INDAL's SMART Levelwind can be adapted to allow a novel approach to overcoming this challenge and successfully recover and store both an active vertical transmitter and passive receive array onto the same winch. Expertise gained from over 30 years of systems experience on both surface ships and submarines are presented.
11:50
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
    The instruments integrated into an Autonomous Underwater Vehicle (AUV) have a significant role to play in painting an accurate picture of the battlespace. Recent advances in integrated sensor technology have seen the introduction of new instruments in a form factor suitable for low-logistic AUVs which help extend operational range and enhance domain awareness - effectively improving the value of the platforms whilst maintaining a small operation footprint. The integrated sensors consist of a tightly coupled Inertial Navigation System (INS) aided by Doppler Velocity Log (DVL) and Ultra Short BaseLine (USBL), the output is used to geo-reference navigation for a Multi Aperture Sonar. The result is that the AUV that can build a larger and more accurate picture of the environment in a pre-defined period of time and provides improved performance for common Mine Counter-Measurement (MCM) tasks such as Computer Aided Detection and Classification (CAD/CAC).
  2. Theatre 4
    20 mins
    • COMMERCIAL TECHNOLOGIES
    Cyber-threats for vessels have grown in reach and complexity. Stakeholders in the naval industry must rely on novel methodology to protect critical data and to maintain safe and reliable operations at sea. The first step is to make sure that systems are designed, installed and operated according to recognized international standards and recommendations. In addition, testing these systems and networks for possible vulnerabilities and robustness is crucial to verify that the implementation of their design is safe, secure and in accordance with vendor's documentation. We provide tangible examples based on our findings from cybersecurity tests and surveys performed on various vessels and systems. Typical pitfalls are discussed, such as inadequate protection mechanisms, vulnerabilities in controllers, insufficient network capacities, and consequences thereof. The types of tests are presented, covering stress and robustness testing, penetration testing, network segregation, authentication weaknesses, traffic anomalies. Are humans, devices, or both the main cause for vulnerabilities?
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    The fidelity of acoustic models depend heavily on the accuracy of the input. A particularly important input is the sonar self-noise. Self-noise may be measured during sea trials, and general estimates may be found based on several trials. However, the environment changes from test to test, and, typically, a limited number of tests is available. So we question; how reliable are general self-noise estimates when used in an arbitrary environment? For a towed array, we have a few self-noise measurements available, all conducted in different environments at varying antenna depths. The acoustic model Lybin was employed in order to investigate how the environment influences the towed array self-noise. We found that the influence was limited. That is, the noise emitted from the sonar platform and picked up by the towed antenna is mostly insensitive to the environment.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Submarine control surfaces are hydroplanes, which take the form of diving planes, rudderons, or rudders, depending on their position and orientation. They are used to change the roll, pitch, and yaw of the vessel, which controls the depth and bearing of the submarine and provides stability. Most control surfaces are of significant mass and surface area, meaning the forces required to operate them are very high. Of particular interest are the sea-slap loads, which the control surface and actuator must survive during normal operation. Hydroplanes have historically been controlled by hydraulic linear actuators, but there is growing interest in an electrically driven solution. This paper focusses on the requirements for electrical control surface actuation and how modern electrical drives and mechanical drive-trains can be used to make the designs possible.
12:10
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
    Current submarine system design usually uses standalone so called stovepipe systems which are connected via individual interfaces to share uniquely defined data items. Figure 1 Stovepipe system integration Each system uses its own HW/SW Design, interconnection is done via Ethernet or RS422 but without real common infrastructure. Functional and non-functional, each system is designed as standalone relying only on the most basic sensor data input. From our completed and ongoing projects – submarine and surface - we received a lot of comments revealing demands for new ways of system integration. A short summary that reflects key comments and our perception of their motivation. To move on to the next level of integration we conducted analysis of our current supply of subsystems to submarines and explored the benefits and possible savings. Let`s have a look at different high integrated Systems.
  2. Theatre 4
    20 mins
    • COMMERCIAL TECHNOLOGIES
    Submarine communication depends heavily on suitable antenna solutions, which in turn, are increasingly subject to new technical and operational requirements. This is particularly challenging in submarine environment with its limited installation space and susceptibility to mutual interference. Furthermore, current antenna systems are also affected by partial obsolescence. Against this backdrop, Hagenuk Marinekommunikation GmbH (HMK) has developed of a new multi-functional antenna, which, beside traditional operational capabilities, covers new civil and military communication services. It is compatible with existing mast designs of various suppliers and suitable for upgrades of existing platforms. The presentation will cover the design objectives of HMK's new multi-functional antenna as well as other means to extend the operational capabilities of submarine antenna systems.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Digital underwater acoustic communication is an enabling technology for naval missions and a developing field for the last forty years. This has resulted in a variety of commercial underwater acoustic modems. Most military end-users want to know more about the performance of these systems than is advertised in the manufacturers' brochures. However, the performance of underwater acoustic modems depends heavily on the environment. Fortunately, this has also been an issue for sonar users for the last hundred years. Furthermore, underwater acoustic modems and sonars are both detection and estimation systems, and they also operate in comparable frequency bands. In this paper, we examine the commonalities and differences between sonar and underwater acoustic communication performance modelling. Communication signal processing algorithms are often more complex than sonar algorithms. Integrating them in a performance computation might require actually running them through a simulation rather than representing them by a model.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    Our 4 seater Swimmer Delivery Vehicle (SDV) the Mk. 1D, primarily operates in confined and shallow waters. This is a challenging environment were traditional diving navigation methods are not sufficient enough. The craft can reach great speeds and long ranges underwater. Navigation and situational awareness are of paramount significance. We were in need of a system that allowed the 'pilot' to have a greater situational awareness than his own 2 eyes were able to give him. The vessel needs to know were it is at all times, see what is happening directly in front of it. This information needs to be conveyed to the pilot in such a way that it is evident what is happening around him and were he needs to go. To solve this challenge we developed our own underwater Augmented Reality goggles coupled by Sensor Fusion with the vessel for a perfect Man/Machine teaming.
12:30
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
    In order to develop a navigation algorithm of a submarine using several sensors such as Inertial Measuring Unit, Doppler Velocity Log, Pressure sensor, and so on in the design stage, similar submarine motion data as the real one's should be necessary. When a submarine runs in the periscope depth below wave surface, environmental force like wave and current act on the submarine and it results in oscillatory or drifting motion. Such motion should be considered to simulate the sensing data of several kinds of navigational sensors. In this paper, hydrodynamic force acting on a submarine is modeled by hydrodynamic coefficients which are estimated by computational fluid dynamics technique. In addition, irregular wave forces for all directions are calculated by 3D panel method based on potential theory and added to the equations of motion using interpolation. As the result, artificial motion data corrupted by errors of sensors are generated.
  2. Theatre 4
    20 mins
    • COMMERCIAL TECHNOLOGIES
    The demand of modern navies for incorporating submerged submarines in naval networked operations (e.g. cooperative bistatic ASW) is increasing more and more. This trend in ASW and the general need of different navies to communicate with a submerged submarine at speed and depth are key drivers to push underwater communications (UW Comms) from a research level to products. Current R&D activities at ATLAS ELEKTRONIK GmbH aim at the development of concepts for integrating UW Comms capabilities into submarines sonar systems. In principle, ATLAS sonar systems provide the hardware and processing power to implement Comms functionalities for submarines. The wide spectrum of ATLAS sonar sensors enables the possibility to develop software defined UW Comms transceivers, covering several transmission modes and standards (e.g. STANAG-4748) without changing the submarines hardware. This functionality, in combination with a gateway buoy concept enables a submarine to act as a team player in networked operations.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    This paper looks at the importance of bubbles in ship wakes, which can give rise to scattering and absorption of propagating sound energy. This can interfere in underwater acoustic detection, tracking and identification of a ship. Hence, understanding the physics of insonified bubbles helps model their behaviour better. Since bubbles within a wake dominate a ship's overall acoustic characteristics, determining bubble populations and their dispersal within it can help build realistic acoustic models of the wake. Few publications on wake-generated bubble populations at sea exist in open literature. Therefore, recent local measurements of acoustic backscatter and excess absorption by bubbles in wakes, generated by passing boats, combined with historical data from other studies are expected to produce more realistic acoustic models of ship wakes. The paper also considers some bubble rejection/enhancement and target classification techniques.
12:50
  1. Theatre 3
    10 mins
    • SENSORS AND PROCESSING
  2. Theatre 4
    10 mins
    • COMMERCIAL TECHNOLOGIES
  3. Theatre 2
    10 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    10 mins
    • PLATFORM DESIGN
13:00
  1. 60 mins
14:00
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
    Technology is a key driver in the Platform Design with Commercial Technologies becoming more prominent and this has been demonstrated in the evolution of the Submarines Control System on the latest class of Attack Submarines being produced for the Royal Navy. The Platform Designer responsible for the Submarines Control System has a choice: Utilise a bespoke solution for the Submarine Control System or Utilise a COTS based technology Submarine Control System solution The paper will investigate the impact the choices that the Platform Designer is faced with and why the Platform Designer should consider a more holistic approach to support the whole life cycle (E.g. ADMID). The paper will introduce a case study to explore the introduction of COTS into a Platform Complex Solution on board a Royal Navy Submarine, before providing a look ahead at the possible role COTS technologies can play in future submarine Platform Management Systems.
  2. Theatre 4
    20 mins
    • PLATFORM DESIGN
    After more than 30 years of development high temperature superconductors (HTS) have finally achieved a degree of technological maturity that makes them suitable to become the game changers” in the race for developing all electric and hybrid-electric naval propulsion systems. The superconductors industry has entered a phase of growth and economies of scale. Manufacturing technologies enable serial and continuous production of large quantities of HTS wire, coils and other application specific configurations like bulk magnets. Theva Dannschichttechnik has succeeded in achieving outstanding improvements in the performance of Gadolinium-based (GdBa2Cu3O7) superconducting wire, referred to as second generation high-temperature superconducting wire, using the electron beam physical vapour deposition (EB-PVD) technology and facilities proprietarily developed by Theva. Today, Theva has reached a phase where it can supply high-temperature superconducting wires on a commercial basis based on a robust production technology, high quality consistency and very competitive prices.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    During the international trial RIMPASSE 2011, for both the research vessels CFAV Quest and RV Planet, acoustic trials were conducted at shallow and deep water sound ranges throughout Europe, using predefined conditions and procedures. The consistency of the platforms as noise sources was monitored by means of a large number of on-board mounted accelerometers One of the research topics is the reported underwater noise levels at different ranges with various hydrophone configurations and how the environment deep water vs. shallow water - affects the results. The contribution of the auxiliary machineries was measured at the static sound ranges of Loch Goil and Aschau. Sailing runs for the determination of the overall noise contribution were carried out at the dynamic sound ranges of Loch Fyne, Heggernes and Aschau. This paper is confined to the range comparison of the noise levels of the research vessel Planet.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    The crew of a disabled submarine lying on the seabed can either be rescued by a submersible or undertake an escape using built in escape system. Either method has its limitations; however, the ultimate aim is to provide the crew with a safe means of leaving the submarine, minimising the risk of decompression sickness and maximising the probability of survival when at the surface. The safest method of evacuating the submarine is rescue but there a number of factors that may lead the crew to conduct an escape including uncontrolled flooding, fire, contaminated atmosphere and radiation hazard. The crew must consider the situation and decide at what point they must begin the escape process. This paper will explore the primary factors and the consideration that escape system designers should consider to provide the crew with the best chance of safely reaching the surface and surviving until rescue forces arrive.
14:20
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
  2. Theatre 4
    20 mins
    • PLATFORM DESIGN
    Our proposal of ship magnetic deperming system is to use High Temperature Superconducting (HTS) cable to form a loop coil which is stably set flat on the seafloor in very shallow water. The power supply, which is smaller compared to that for conventional conductor coil is set on land, together with refrigerator to cool the whole line, also on land close to the system. In the previous work, we have calculated the cable with current capacity of 100 KA and a length of 1,100 m to create one loop on seafloor with power supply and refrigerator as a unit to form the total deperming system. We will show result of the study of our HTS deperming system to built with presently available technology, such as Conductor On Round Core (CORC) cable. Our plan of four sets of six tied CORC in one line to satisfy our requirement will be shown.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Risk of mine's detection leads today to hold an efficient closed loop degaussing system. Magnetization identification is the key point of this process. The magnetic anomaly is directly linked to the magnetization that is why it is essential, for the ship, to evaluate its own magnetization in order to cancel its signature. Magnetization identification consists in solving an inverse problem from measurements. This paper will discuss how it is possible to perform an effective post-treatment. Indeed it allows us to get free with the sensor's position and the post-treatment makes possible to be positioned extremely close to the hull. These two notable points lead to project an effective inversion of a magnetostatic problem into thin elements. The resulting algorithm allows to follow the variations of magnetizations and mechanical stresses to have an optimal closed loop degaussing.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    This study presents a novel approach to the diagnosis of unbalanced load (blades damage) faults in an electric thruster motor in UMV propulsion systems based on orthogonal fuzzy neighbourhood discriminative analysis (OFNDA) for feature dimensionality reduction. The diagnosis approach is based on the use of discrete wavelet transforms (DWTs) as a feature extraction tool and the optimal number of mother wavelet function and levels of resolution by analysing the vibration and current signals. A dynamic recurrent neural network (DRNN) was chosen for fault classification and level of fault severity prediction was implemented. Four faulty conditions were analysed under. The results obtained from the simulation demonstrate the effectiveness and reliability of the proposed methodology in classifying the different faults with greater speed and accuracy compared to existing methods.
14:40
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
    In recent years a number of AUV swarm concepts have been successfully trialled and a number of lessons have been learned through these demonstrations. One common thread has been the requirement for AUVs in as swarm to be able to communicate with the other members of the swarm. The underwater communications space primarily relies on acoustics and managing the acoustic channel is a challenging problem which restricts the amount of data that can be shared and the pace at which it can be shared. New developments have seen the introduction of instruments that enable AUVs to both find their position in the swarm and communicate effectively while making most effective use of the communication channel. These instruments could enable more effective fielding of AUV swarms.
  2. Theatre 4
    20 mins
    • PLATFORM DESIGN
    The absorption of Carbon dioxide (CO2) is still an important topic in manned submarines. For decades, non-regenerative principles as soda lime or LiOH have been filtering the boats atmosphere. But life cycle costs (LLC) as well as sustainability are in focus. Regenerative methods provide the possibility to decrease the LLC and enable a cruising range enlargement. The downside of a regenerative system is the energy demand. Beside the CO2 adsorption unit also the discharge unit represents a large energy consumer. Therefore, submarines with regenerative CO2 absorption systems need the possibility to discharge the CO2 in any depth without noise and low energy consumption. The current state of the art of discharge systems will be presented.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Modern submarines are equipped with a large number of acoustic and non-acoustic sensors, to support the commander to get an overview of the threat scenario. Today a comprehensive ESM system (Electronic Support Measures) is standard on all modern submarine classes. This lecture introduces a new development of a passive antenna to receive radar signals and radio signals as well. The combined antenna is mounted into one compact radome and can be placed on top of a periscope. This gives the chance to get a first overview about the electronic threat scenario around the submarine, while only the (attack-) periscope is hoisted and the submarine is still submerged on periscope depth. On board a radar early warning receiver and a comms warning receiver is able to process the received signals and contribute to the situational awareness picture of the electronic order of battle
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    The adoption of advanced techniques for the survey of in-service submarines is key to improving the cost-effectiveness and quality of assurance outputs, and increasing submarine life and availability. This paper discusses work being undertaken by Babcock to develop and adopt the use of new survey technologies, including; Remote inspection using ROVs and underwater scanning equipment, and UAV's for aerial survey and 3D mapping. The development of a system enabling the in-situ inspection of tail-shafts using ultrasonic testing techniques. This system has the potential for use across the marine industry to prevent inadvertent tail-shaft failures in-service. The use of 3D scans to support the survey of submarine structures, offering the surveyor an accurate tool to record potential defects, and greater confidence in evaluation and sentencing. 3D Scanning enables improved stress analysis of submarine structures, and the mapping of legacy equipment for reverse engineering and the manufacture of spares.
15:00
  1. Theatre 3
    20 mins
    • SENSORS AND PROCESSING
    The maritime domain is undergoing a shift in focus towards the use of unmanned systems to deliver capabilities. This brings new challenges; whereas a human on board the vessel would previously have been responsible for safety and decision making, that responsibility is now being removed to a Watchkeeper in a remote location, or devolved entirely to the autonomy system. In order to deliver a useful capability, unmanned systems will be expected to operate in at least the same, or worse, environmental conditions as the current manned platforms, but without the human insight and perception that a skilled coxswain would currently provide. In 2017, Thales conducted a study focusing on poor weather navigation of a USV to explore these challenges and trial some innovative solutions. This paper discusses the core issues within this study, the selection of a suitable sensor suite, and how this was implemented and trialled using a USV.
  2. Theatre 4
    20 mins
    • PLATFORM DESIGN
    Indoor air quality in submarine enclosed cabins influences the health and operational effectiveness of crew onboard. The air contents are very complicated due to different airborne contaminants caused crew, equipment operation, gas leakage and material volatilization, etc. Especially respiratory germs following the exhaled air or aerosols during respiratory behaviours led respiratory diseases frequently. Based on typical enclosed cabins for research objects, using Computational Fluid Dynamics (CFD) method and one of multi-zone network models, Sequential Box Model, the article researched the distribution of airborne contaminant influenced by different ventilation modes, different ventilation rates, different strength of respiratory germs and different exposed time. And the quantitative risk evaluation of crew having the respiratory diseases was also researched. The results show that this method can make effective simulation for transmission of contaminant and airborne infectious disease, which can provide reference for evaluating and optimizing submarine air environment control system including airflow distribution design.
  3. Theatre 2
    20 mins
    • SENSORS AND PROCESSING
    Since World War II, EW Systems are widely used by the navies as a force multiplier. Especially, with the stealth feature of submarine platforms which has EW capability, get a big chance to control the EW Spectrum and predict the reaction of the enemy platforms before they move next step. The development in the Software and Hardware technology reflects to the EW systems too and as of today, very compact and capable EW systems can be integrated in submarine platforms and the naval operations started to change with this new player in the field. In this paper, new features of modern EW systems in submarines will be discussed in details. Each of these features has a big impact on submarine operations and the navies which use these EW systems on their submarine platforms are the player on the game.
  4. Theatre 1
    20 mins
    • PLATFORM DESIGN
    The appetite of many Governments for Defence Spending in recent years has generally reduced to that of seemingly essential procurements. There is a focus on the essential need to demonstrate reduced procurement costs of capital assets by minimising the design for through life effectiveness and sustainment in order to gain funding with the impact on Life Cycle Costs being ignored or given less visibility. Effective design for Life Cycle Cost effectiveness will facilitate Life Extension Proposals and enable informed decision making. In turn, this will provide clear indication to Governments as to when it is essential to commence replacement projects in order not to create capability gaps. The outcome of the paper will be to offer recommendations for the an effective life cycle design providing Governments with visibility of how consideration of life cycle sustainment impacts will provide the most effective application for precious tax payer monies.
15:20
  1. Theatre 3
    10 mins
    • SENSORS AND PROCESSING
  2. Theatre 4
    10 mins
    • PLATFORM DESIGN
  3. Theatre 2
    10 mins
    • SENSORS AND PROCESSING
  4. Theatre 1
    10 mins
    • PLATFORM DESIGN
15:30
  1. 0 mins

2019 Sponsors

Event info

UDT 2019 date & time:

Mon 13th May - 09:00 - 17:30
Tues 14th May - 09:00 - 19:30
Weds 15th May - 09:00 - 15:30

Venue info

Stockholmsmässan
Mässvägen
1 125 30 Älvsjö
Sweden

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