D-12 



TM 102 



Function : Pipe Trenching. 



Operating Depth : 200m (660 ft) 



Dimensions (LxWxH) : iHm x 15m x Tm (H6 ft x 39 ft x 23 ft) Vehicle is 



22m (72 ft) wide with arms extended. 



Weight (Dry) : 193t (213 tons) 



Speed : Information not available 



Power: Supplied by generators aboard support ship to electric and 



hydraulic motors aboard the vehicle. 



Propulsion : Caterpillar tracks. The vehicle has a sea water ballast 



system of 2Tt (30 tons) capacity which permit it to be towed on the 



surface to the dive site and lowered - by venting the ballast system - to 



the work site. Sensors on the vehicle keep it from making direct contact 



with the pipe. The vehicle can also employ its ballasting system to 



vary for different sediment conditions. 



Tools/Instrumentation : Two, hydraulically-powered trenching arms with 



90 degree movement and cutters. Two synchro feelers with to 30 degrees 



vertical movement and plus or minus 15 degrees horizontal movement. 



CCTV. The machine is capable of backfilling the trench after the pipe 



has been laid. 



Navigation : By visual contact (TV) and by sensors which relate the 



vehicle's position relative to the pipeline. 



Shipboard Components : Control/display console, diesel generator, four 



hydraulic winches for tether handling. 



Support Ship Requirements : Dedicated support ship: LOA-50m (16I4 ft), 



beam - 12m ( 39 f t ) , draft - km (l3 ft), power supply consisting of one 



1,300 hp and one U5 hp motor generator, space for three containers 



requiring 200 sq m (2,152 sq ft). 



Status : Operational 



Builder/Operator : Technomare S.p.A. (Societa per lo Svilluppo delle 



Technologie Marine) 

 Venice, Italy 



