SURFACE CONTROLAND POWER SUPPLY Type 4 TMS System Power Supply This garage-style TMS uses a bale arm arrangement to spool 200 metres of tether on and off a fixed drum without the additional cost of a slip ring. Amore compactType 2 TMS is available for the Seaeye Tiger with 140 metres of tether.The floor of the TMS can be adjusted toaccept the additional height of the ROV when fitted with a tool skid. The Power Supply Unit incorporates a series of protection devices, interlocks and cooling fans. Internal AC and DC supplies are only distributed when remotely operated at the Surface Unit. The PSU requires a customer supplied380-480 VAC power input.Full safety features include both AC andDC Line Insulation Monitors (LIMs) that constantly monitor electrical leakage in the system. Both LIMs have trips and alarm indicators.Anew test facility allows the LIM to testthe isolation of the system - without applying power - using a simplified menu driven set-up for umbilical current compensation. Multiple tapings are provided for the 3-phase 50/60Hz input supply. DEPLOYMENT Both Rovs are generally operated from aTMS but can be used free swimming with up to 450 metres of soft umbilical. For greater protection of the vehicle as itpasses through the splash zone and for faster travel to and from the working depth, it is more usual to deploy this type of ROV in a garage Tether Management System (TMS). Askid mounted ‘A’frame, hydraulic powerunit (HPU) and winch with an appropriate length of steel wire armoured lift umbilical is the most common Launch and Recovery System (LARS) used for vehicles like Lynxand Tiger with a TMS. SEAEYE TIGER&LYNXSYSTEMGA Keyboard Arack mountable keyboard is supplied for entering data and free text onto the video overlay. Hand Control Unit The Hand Control Unit (HCU) provides the interface between the operator and vehicle using a series of switches and controls. Working on a 5 metre ‘flying’ lead, the HCU controls the following:•Vehicle movement, direction and speed•Lighting •Tilt control (Pan control for P&TUnit, if fitted)•Safety marine thruster enable switch •Auto depth and heading •Additional camera selection •Propulsion system offsets and power settings Telemetry Monitor Unit ATelemetry Monitor Unit is included in the spares kit. This interface unit with its associated software allows ROV data, such as heading and depth, to be displayed on a PC and/or exported to a survey computer. The unit is also used for fault diagnostics. The surface control system provides:•AC and DC supply switching control•DC current and voltage indication •Control of video and video overlay •Akeypad for system configuration •Plugs and sockets for system connections and interfaces for ancillary equipment•ROV control system (remote from the Hand Control Unit)•Output to the Telemetry Monitor Unit Control data is transmitted between thesurface Central Processor Unit (CPU), PCB and subsea CPU PCB via dedicated twisted-pair cables from the ROV using a half duplex RS485 communication link. Monitors The system comes with a 15” colour video monitor and 19” rack mounting kit. Video Overlay The monitors display the video information from the camera and video overlay data as follows:•Heading data (in degrees)•Analogue Compass Rose •Depth in metres (or feet) •Altitude (optional) •Tilt position (or Pan & Tilt position if fitted to Lynx)•Date and time •Free text from keyboard •TMS Bail Count (TMS cable counter when used with TMS)•CPprobe readings (if fitted) •Vehicle Turns Counter