Engtek SubSea Systems

Transcription

1 Engtek SubSea Systems A Division of Engtek Manoeuvra Systems Pte Ltd SubSea Naval Technology Shallow Water Combat Submersible (SWCS/SDV)

2 Engtek SubSea Ocean Systems Page 2 of 12 General 1.0 Scope The Shallow Water Combat Submersible (SWCS) or SDV (Swimmer Delivery Vehicle) enables the crew to approach their objective tactically without being detected. It is a swimmer delivery vehicle which can carry assault swimmers. The SWCS can be used for offshore intervention or coastal intrusion. It is able to maneuver on and below water surface to carry 4 or 6 combat assault swimmers with their gear. The typical Swimmer Delivery Vehicle (SDV) is a large electrically-propelled torpedo-like craft which can operate from a dry deck shelter fitted to a full-size submarine. The cylindrical deck shelter is hooked up to the sub s escape hatch, functioning as an underwater docking bay for the mini-sub. The vehicle can also be launched from shore or a small support vessel. Four SEAL passengers and two crew can ride in the SDV, wearing breathing apparatus. One of the roles of combat swimmers is to conduct amphibious reconnaissance or raids. In order to achieve tactical surprise, it is essential that the approach to targets must not be compromised. One of the methods used is by means of the sub-surface craft which has advantages as follows. To transport assault swimmers to a target from launching mother ship. To carry necessary combat equipment, like demolition charges, electronics, counter measures or weapons for each specific operation. To approach the target through underwater to avoid observation by the objective through radar, visual observation or patrol. Shallow water approach makes it extremely difficult for the objective to detect the craft by all means. Mission capabilities include and are not limited to: Reconnaissance, intelligence, surveillance, inspections, infiltration / ex-filtration, raid / assault, neutralization, counter measures, enemy access denial, intervention in hostage situations and recovery of assets in the water, anti smuggling, piracy, coastal and waterways police patrols and interventions. 2.0 Usage and Tactical Environment The SDV is fully autonomous and is launched from its mother ship. It can be transported on a heavy load trailer. The SDV approaches the Coast just below the surface, then submerges deeper to close in to avoid enemy radar detection and once on the objective, the SDV is berthed in a safe position on the sea floor or at a pre-planned rendezvous, to release swimmers to complete the mission. On completion of the mission the swimmers return to the SDV and proceed for exfiltration. The availability of a combined SDV / Mother ship effectively enhances the capability of the commando team to conduct the following tasks: Surveillance of sea flanks/water-ways. Neutralization. Rescue Missions. Covert reconnaissance on coastal area/objective

3 Engtek-M SubSea Ocean Systems Page 3 of 12 Police Interventions Assaults Infiltrations OPERATIONAL 1.0 Mobility The maximum speed of the SWCS is 12 knots. Cruising speed is 7-8 knots The craft is able of operating at depths Max 300 meters with greater than 95 per cent reliable over 15 twelve-hour missions. The vessel is designed with Shallow Draught for easy launching recovery/operation. Low profile and stealth shape feature allowing unobtrusive approach to target when running submerged. Easy embarkation and disembarkation. All equipment pressure resistant up to maximum operational depth. 2.0 Portability The craft can be transported by Road Trailer. It can be easily deployed for embarkation/ disembarkation from a mother ship. 3.0 Operation It can be easily operated by 1 pilot. It can carry up to 6 men plus combat load. Fully automatic navigation modes, auto pilot, touch screen charts to upload route, trajectory, speed and depth. The Integrated Bridge System is essentially a new comms/sensors/it chassis. The SWCS will house an IBS with an open architecture, a power and signal distribution system capable of integrating various electronic systems and sensors, and the capability to display operational data to the vehicle pilot and navigator.

4 Engtek-M SubSea Ocean Systems Page 4 of The SWCS Auto Pilot System (APS) System Surveillance The autopilot system (APS) is ideally suited for surveillance requirements. Typically the autopilot guides the vehicle to the survey area, and then follows a predefined route while payload instruments are brought to bear on the field of interest weather it be side scan sonar, radar, visual/infrared imagery, chemical or radiation sensors, or other supplied sensors. The autopilot modes take care of navigation and control while its command and control link is configured to control the payload instruments. The instruments may be automatically switched on at specific waypoints, or they may be controlled by the pilot using the command link. An additional data logging processor may be used for automatic data logging of navigational data as well as payload sensor data, for detailed post-mission analysis. Remote Controlled Mine Hunting Mine hunting involves operating payload sensor systems over a pre-programmed mission track. The autopilot is capable of driving the vehicle over the track, at low speeds, and hovering within a defined area when the sensors detect an object of interest. The system provides command and control channels for remote control and monitoring the payload. A comprehensive remote control interface allows the operator to intervene and investigate suspicious contacts; or to download new mission data remotely. A special control mode allows the vehicle to stay on a fixed station relative to a hoist ship. This may be used for instance, to scan the area ahead of a warship or submarine underway. The standard control workstation includes a PC running the Control Work Station software. This package provides total control and monitoring facilities: Route planning and upload/download Mission recording and reply Electronic chart input/output for vehicle activity, waypoints and routes Vehicle systems status and control payload systems status and control The workstation software may run on a laptop PC. Heading Following In heading following mode the pilot selects the desired heading and the autopilot controls the appropriate thrusters, rudders, etc. in order to achieve the desired heading on the SWCS compass. Under speed control the autopilot controls the appropriate thrusters, etc. in order to maintain the set speed as measured by the speed log

5 Engtek-M SubSea Ocean Systems page 5 of 12 Track Following In track following mode the pilot enters a set of waypoints, specifying a desired depth / height for each one. The autopilot will then control the track of the vehicle to make it move to each waypoint at the correct speed. Waypoints may be set up on an electronic chart system or ECDIS, and downloaded; alternatively they may be entered directly by providing coordinates. The track controller effectively provides a high level mission control, including the following features: Choice of track acquisition conditions - for example, starting at the nearest waypoint or at the start of the track; Choice of operational modes on completion of the track; Linkage between waypoints and events - for example, so that the speed or depth/altitude changes at a specific waypoint. Vehicle Following Vehicle following allows one vehicle to follow another, taking up a station specified by the pilot. For example: A mine detection system programmed to run some distance ahead of the vehicle to seek out potential threats; A surface unit which being used as a communications relay for a submerged vehicle below it. A communications link, between units on board the two vehicles, passes information about the current position, heading and velocity of the vessel to be followed. The vehicle autopilot then follows this vessel at a user-specified distance and bearing, all the time ensuring that a predefined safety zone around the vehicle is not encroached. Hovering on a Point In order to hover on a Point the autopilot controls the position of the vehicle relative to a pilotdefined waypoint. Two modes are possible: Position Control by Maneuver (PCM) in which the vehicle heading is chosen by the autopilot to minimize thruster activity and fuel usage. This mode is efficient if there are significant environmental forces (tidal stream and / or turbulence or waves); Dynamic Positioning (DP) in which the operator specifies a heading to be maintained subject to environmental constraints. This might be used for example if a sensor is to be directed on a stationary target.

6 Engtek-M SubSea Ocean Systems Page 6 of 12 Hovering within an Area Hovering in an Area - the vehicle is controlled to maintain its position within a nominated region. Again, this is subdivided into Area PCM and Area DP (see PCM and DP, above). Area hovering is a very versatile mode and is the most fuel-efficient method of hovering, because it allows the vehicle to drift a controlled amount without making continual corrections and counter corrections. During Area Hover, several area conditions may be specified simultaneously. For example, the vehicle may be commanded to stay: Within a set distance of a datum (waypoint); Within a defined boundary; Avoiding one or more defined danger zones. These conditions may be superimposed simultaneously. At the same time, the operator (in Remote Control mode) may use a joystick to superimpose a controlled drift - for example, hover within a set zone alongside a pipeline, and slowly drift along it, while maintaining a desired heading so as to bring sensors to bear on the pipeline. This minimizes the difficulty for the operator, as well as control communications bandwidth, because the autopilot takes care of the second-by-second control of the thrusters, and the operator only has to issue a simple "drift" command. Attitude and depth / height control The autopilot system incorporates controllers for attitude (roll and pitch) and depth / height control. Roll control is built in to the attitude controllers, however, because some vehicles cannot achieve independent control of depth / height and pitch, two integrated controllers are provided: Controller Type 1 uses independent depth / height and pitch control algorithms. This is particularly appropriate when the actuators for pitch and depth / height are separate units giving a capability for pitch to be adjusted independently of depth / height - for example, four vertical thrusters may be used together to thrust upwards, and differentially to adjust vehicle attitude; Controller Type 2 uses pitch, in conjunction with vehicle forward motion, to adjust depth / height. This is appropriate, for example, for a vehicle equipped with forward hydroplanes.

7 Engtek-M SubSea Ocean Systems Page 7 of Inertial Navigation System The PHIMS 6000 with DVL is a SubSea Inertial Navigation System, providing the SDV with position, true heading, attitude, speed and heave. Its high-accuracy inertial measurement unit is based on FOG technology coupled with an embedded digital signal processor that runs an advanced Kalman filter. 4.0 Maintainability The craft and components are serviceable and repairable by service technician using standard marine material and facilities where possible. 5.0 Reliability The craft is reliable and robust for military use, availability 100%. CHARACTERISTICS 1.0 Physical The SDV submersible vessel comprises: Materials All materials used in the construction of the craft are marine grade, all parts and component of the submersible are marine grade, galvanic corrosion protected, UV resistant, with hull segments in fiberglass fiber reinforced vinyl ester plastic and supporting structure in aluminum (marine grade).. Optional low signature coating on the hull to reduce risk of radar and/or sonar detection is available. The craft is inherently corrosion resistant, protected from electrolytic action, new and fit for the purpose intended. Hull The rigid hull is strong enough to support all normal operating loads and can withstand minor collision against reefs floating objects or obstacles. Hull is to resist light collisions; inflatable chambers within the ballast s provide emergency floatation in case of breach in the hull. Deck and hull can receive mounting for weaponry upon request. Hull comes complete with acrylic folding access hatches view ports all around the cabin to provide side viewing and 1 roof view port to monitor surface activity. Buoyancy and Trim The ballast system enables underwater depth adjustment and also surface/sub-surface floatation buoyancy. The adjustment system works with pumps and /or compressed air. The buoyancy system allows depth control and trim adjustment, buoyancy is easy to set up, control and very precise especially when not moving, perfectly stable in mid water, immobile, with several different trim/buoyancy tanks and 1 anchor ballast to set down the craft on the sea floor when swimmers exit the submersible. The submersible is able to operate surfaced, awash or submerged, and stay stable at all time.

8 Engtek-M SubSea Ocean Systems Page 8 of 12 Measurements The basic vehicle unit has the following dimensions but subject to change with customer add-ons and task configurations. Length: 12 meters. Beam: 1.65 meters. Weight lightship 5,700 kg. Definition: Light Ship is the weight of the vehicle without payload, fuel, crew, mission equipment or diving gear. Full load 6,200kg and taken as light ship with 6 crew, static diving gear (spare breathing system) cargo and portable diving gear (rebreathers), operational equipment and fuel. 2. Technical 2.1 Construction. Constructed with the following characteristics FRP Composites Marine Grade Aluminum Superstructure. Passenger Grip Points - Secure hand grips are provided for all passengers. Color - Custom, Navy Grey, camouflage or Dark. Lifting/Towing Points - Lifting points are available for lift for retrieving under slings by Parent Craft or at Port. Substantial towing points are provided for recovery to trailer or for towing at sea. Propulsion System Powered by Brushless DC electric motors to achieve a maximum speed in excess of 10knots (Full load Sea State 3 or lower). SubSea Electric Propulsion Modules are designed to be used on a submersible vehicle. The Drive System consists of brushless motors, feedback devices and control electronics housed to permit submerged operation in water. The unit uses dual redundant (2) motors on a common shaft, two feedback devices and two sets of Motor Controls, sensors and electronics in a single integrated housing. The unit will accept nominal 150 Vdc input power and a speed control command to provide shaft output at the commanded rotational speed. SubSea Propulsion Modules Designed and manufactured for the SDV (Seal Delivery Vehicle) program. Motors have dual windings + controllers in case of failure.

9 Engtek-M SubSea Ocean Systems Page 9 of 12 The motor controller and amplifiers will interface with the Operators Main Control System to control the shaft speed. The Operator provides a speed command to the Motor Controller/amplifiers. The MCs reads the position and speed of the shaft using resolvers, close the speed loop and provide motor commutation. The MCs returns status information such as propeller speed (RPM) and Built- In-Test (BIT) results through analog (or digital) with discrete interfaces or optionally using an RS- 422 serial interface. The system is configured such that should one motor or controller fail, the unit shall remain functional with reduced available shaft power. 2 x vertical thrusters for hovering capabilities. Battery Lithium cells, explosion and fire proof, 5 hours top speed capacity, to endure 24 nautical miles minimum recharge cycles. Battery Compartment and box connections all electrical wirings are waterproof up to maximum operational depth. Steering Wheel, dive plans. The steering and dive wheel is strong and fit for the purpose. Steering effort is light and less than four turns from hard over to hard over. 4 dive plans and 2 rudders on actuators, Carbon-Fibre Dual Counter Rotating Propellers with changeable blades when damaged. Low RPM 5 -bladed carbon fiber propellers for low acoustic signature. Machinery is designed for reduced noise. Performance Load Capacity Capacity of 4 men with full combat load. Optional 6 men with reduced battery capacity. Payload: 300 kg. Speed Water Surface 14 knots Awash: 10 knots. Fully Submerged: 10 knots cruising speed 7 knots

10 Engtek-M SubSea Ocean Systems Page 10 of 12 Depth control 2 x vertical electric thrusters 2 x variable ballast are for buoyancy control. Maximum depth: 75 meters Cruising depth, 1 to 50 meters Inflation and Deflation System The vessel has a system for blowing and flooding main ballast s and variable ballast s. Ballast system: 2 x main ballast for main floatation at the surface, 2 x water pumps to drain water out of the cabin for higher floatation for surface transits, 2 x variable ballast for buoyancy control, 1 x anchoring ballast for berthing on the sea floor. 2.4 Navigational Equipment The Craft has efficient navigational equipment for surface and underwater including Doppler system, flux gate compass, inertial navigation system, differential GPS and speed log. Inertial navigation system allows undersea navigation with +/ -.5 meters precision after 12 nautical miles. Auto pilot: coupled to inertial navigation system, allows fully automatic navigation mode, touch screen to upload GPS positions of starting point and objective location, rendezvous, depth, heading, speed, altitude control. Echo Sounder The craft has an echo sounder for depth reading. Sonar High performance multi beam sonar, high definition imaging for obstacle avoidance and seafloor viewing. Field of view: 45 deg, Max range 450Ft, range resolution: 2, up to 10 images per second Dashboard The craft has Ammeter, voltmeter, dive computer, sonar screen, tachometer, speedometer, video screen, GPS, underwater navigation system, temperature, oil, gas capacity, air analysis, pressure gauges, altitude, depth meter. Touch screen displays for controls and text communication between swimmers to avoid noise. 2.5 Air system. 4 x Compressed Air tanks and 6 x Nitrox tanks stored inside the hull. Built in system for air and nitrox supply to ballast system and swimmers. 4 x Portable rebreathers with oxygen tank switch able 100% oxygen close circuit to 32% oxygen semi closed circuit. The portable rebreathers are connected to the air system with a quick disconnect, when swimmers need to exit the SDV they switch to pure oxygen, disconnect nitrox supply and swim out. 4 x Compressed air emergency regulators for crew rebreathers bail out. Maximum duration: 5 hours breathing on rebreathers.

11 Engtek-M SubSea Ocean Systems Page 11 of 12 Spare Breathing System. Provision is made for built in, and portable Spare Breathing Supply for all swimmers. It is equipped with suitable demand valve and pressure gauge to confirm contents. 2.7 Cameras system 1 x color camera, high resolution, 1 x night vision camera, all installed in a 75 meters depth rated waterproofed pod on top on periscope, 360 degree rotation, zoom, joystick control in cabin. Hull cameras x 2, fore and aft the vessel for obstacle avoidance and close maneuvering. Homing Device A homing device which can be activated by the swimmers when required is optional. Obstacle Detection The craft has an in hull sonar transducers for safe target approach and underwater navigation. Periscope Telescopic, 10 Ft high, fitted with a 360 degree Periscope with recording capabilities, night vision, color camera Optional Low signature infra-red paint to avoid detection by infrared sensors. Option of plugging in passive sonar, and ESM [Electronic Support Measures]. Hull and windscreen bullet proof against small caliber up to 7.62 Nato. Anechoic coating to reduce sonar signature Law enforcement/ Rescue lighting kit Craft adapted semi close or close circuit re-breather Weaponry mountings Drone launch capability

12 Engtek-M SubSea Ocean Systems Page 12 of 12 The SWCS (optional) features an extend-able sensor mast allowing the Plug-n-Play integration of various imaging sensors and the IBS data system will allow for recording images and displaying them to the minisub s crew. Optional Mini-ROV complete with deployment cage and 150m cable for close inspection of targets of interest without endanger the crew. Automated Docking feature capability. ASSOCIATED EQUIPMENT Other Equipment Heavy duty hydraulic trailer with NATO coupling for towing. Spare Parts The initial spare part requirement for 3 years is provided and the subsequent provision for at least 10 years guaranteed. Publication The following publication and documentation are in English. a. Servicing Manual. b. Workshop and repair manuals (include all level of repairs). c. Users Handbook. d. Assembly Drawings. e. Illustrated parts catalogue. f. Complete and necessary tool kit for the craft are provided. Conclusion the growing ability of hostile nations to detect, identify and target [special-ops frogmen] conducting undersea tasks. Thus, the SWCS has a modular subsystem design conducive to accommodating upgrades to processors and sensors. Operating in a free-flooding wet vehicle, the SWCS passengers and crew transit for extended durations (up to 12 hours) in a wet, variant temperature environment while breathing from SCUBA gear. Thus hardware and software selected features interfaces that ensure required operator actions are simple and minimized. Engtek Manoeuvra Systems Pte Ltd 50 Kian Teck Road, Singapore