ROTS II trenched its first 10” 4,500 metre long pipeline in May 2002 and together with the 350,000 metres of FO cable trenched in the Northsea and the Baltic Sea the system has proven to be a reliable and capable. A trenching speed of up to 1300 m /hr in sandy soilswidth=150> has been experienced. With the purposely build LARS system ROTS II can be launched and recovered in adverse weather thus minimising the weather downtime.  
ROTS II launching

.................................................................................................................................

Ideal for burial of Pipelines, fibre optical cables, umbilicals and power cables.

Burial depth: 3m – trench width: 1,2 m
Depth rated to 3000 MSW

.................................................................................................................................
The R2 system is transported and loaded in complete parts minimising mobilisation time

.................................................................................................................................
Brief technical specification for ROTS II

Operating depth:
Trenching depth:
Trench width:
Water jet capacity:
Power requirement:
Power/effect “out”:
Thrusters:
Jetting positions:
Dimensions: (LWH)
Weight:		 3000 m
3 m
1,2 m
1000 m3 / 16-19 bar
1.25 mW
900 kW
8, each 600 kg thrust
3 - centre, aft and front
5 x 4.2 x 3 m.
14 tonnes

.................................................................................................................................

Launch and recovery system designed for sea state 7 operation with hydraulic snubber and cursor system.

R2 mobilised with 3 jetting stages for pipeline burial
.................................................................................................................................
LARS is transported and installed in one single piece for rapid mobilisation.

.................................................................................................................................
The success story of ROTS II is based on many years of experince in the business, and two vital items are of most importance for its success; the patented sword and the subsea high pressure water pumps. Our sword technology enables us to alter the configuration remotely, the depth tilt and width (X,Y and Z axis).

.................................................................................................................................
* Two single wheel centrifugal pumps
* Separate cooling system for each pump
* Water pressure up to 19 bar
* Total water capacity 1.000 m3/hour
* Separate conditioning monitoring of each pump
* Alarm with autoshutdown for each system