Pharos has been directly involved with over 750,000km of
subsea cable installation and burial including over 6,000km of 3m burial.
They provide subsea trenching and burial equipment spreads along with experienced
operational and maintenance teams.
This recently refurbished SMD built subsea cable plough
is capable of 3-meter burial in various soil conditions. The hydraulic
functions include trench depth control, cable depressor, operating draw
bar, controlling stabilisers and controlling repeater flaps. Hydraulic
pressure is provided by a subsea 7.5 kW electro-hydraulic power pack. The
system APU connections allow deck checks and function tests while on deck.
The monitoring and surveillance systems include cameras,
obstacle avoidance sonar and positioning beacons. Roll and pitch is monitored
by an inclinometer inside pod. A pressure transducer monitors water depth
while a depth skid monitors trench depth through an in-cylinder displacement
transducer. The plough has starboard and port load-cells integral to the
tow points for tow load readings and the cable tension is also monitored
by a load cell. The distance travelled is tracked via an encoder in the
cable travel wheel.
The spread includes a full set of strategic spares, umbilical
winch, tow winch, control cabin, spares van and more. The spread also includes
a portable case with 20m connecting cable, transformer and insulation monitor
for single phase pod supply, control PC, PC components and wireless telemetry
components. Different launch and recovery (LARS) A Frame options can be
discussed.
