D-7 



SEACAT 



Function : Cable burial. 

 Operating Depth : 200m (656 ft) 



Dimensions (LxWxH): 15 ft x 10.25 ft x 8 ft (5m x 3.1m x 2m) 

 Weight (Dry) : 27500 lbs (l,13Hkg), 1,000 lbs {h^k]<ig) in water 

 Speed : 60 to l80m (19T to 591 ft)/hr (average burial rate) 

 Power : Hydraulic. Electrical power supply: ^415 V, 3 phase, 50 Hz, 

 60 KVA. 



Propiilsion: Caterpillar tracks. Vehicle has ballast tanks that are 

 flooded on the surface to provide approximately 20 lbs (9 kg) negative 

 buoyancy for descent to the bottom. On the bottom they are flooded 

 fully to provide maximum in-water weight. A diver or a manned submersible 

 controls the vehicle as it works. 



Tools/Instrumentation : Trench cutting is performed by a specifically- 

 designed high pressure 'water jet. All other instrumentation requirements 

 are supplied by the attendant manned submersible. 

 Navigation : Supplied by the manned submersible 

 Shipboard Components : Diesel generator. 



Support Ship Requirements : Launch/retrieval device, deck space for 

 SEACAT, and imbilical. Since the vehicle is controlled by either a 

 diver or a manned vehicle, the support ship must include one or both 

 of these as its onboard capability. 



Status : As of 10 November 1978 SEACAT was scheduled for future use as 

 a land or shallow water (lO ft) trials vehicle to evaluate burial and 

 pipe-following equipment and to act as a testbed for the next generation 

 vehicle: SEADOG 



Builder/Operator : British Underwater Engineering, Ltd. 



Leith, Scotland 



