Lia is a purpose built aluminium catamaran, with a stable working platform, which was launched in 2004.

Lia is a purpose-built, aluminium catamaran, launched in 2004.  The vessel has dimensions of 15.3m by 5.8m and a draft 1.0m, providing a shallow drafted and stable working platform.  The choice of main engines and specialist gearboxes provides the vessel with the ability to cruise comfortably and economically at up to 16 knots, whilst also being able to run for extended periods at very low speed.  Low speed running is controlled by hydraulic trolling valves, which allow the engines to run at normal operating speed, whilst the propeller speed is reduced to the required level.  This gives the ability to control the vessel at speeds down to as low as 1 knot if required.

Lia has a single working deck, the layout of which is relatively conventional. The rear working area is approximately 35m2 in size and incorporates a transom gate and overhanging platform, with steps to allow easy access onto the vessel and for deployment and recovery of survey equipment.  Other deck equipment includes a dedicated variable speed side scan sonar winch, hydraulic crane and custom-built mounting gantry, for through moon pool deployment of the multi-beam system.

Lia is fitted with an integrated 13kVa single phase diesel generator that runs from one of the main fuel tanks.  The electrical system incorporates an intelligent 4000W inverter / charger and UPS unit, with separate isolation transformer and voltage smoother, for protection and efficient running of the survey equipment.

Safety equipment carried on board complies with the MCA code of practice for small work boats (SCV Code) and is supplemented by a full complement of immersion suits for all onboard.  Lia operates under the MCA Category 2 certification under the SCV code, allowing her to carry 12 persons up to 60 miles from a safe haven.  A 12-man life raft, with hydrostatic release and 406 MHz EPIRB, are carried onboard.

Lia is permanently mobilised with a suite of high-specification survey equipment including a dual-head Kongsberg EM2040-07 multibeam echosounder with dual-swath capability, C-Nav 3050 GNSS, Edgetech 4200 side scan sonar, with dedicated high specification electro-mechanical winch and pole mounted Sonardyne Mini-Ranger 2 USBL acoustic positioning system.


DesignerGlobal Marine Design PTY, Henderson, Western Australia
BuilderAli-It Marine Limited, Pembroke Dock, South Wales, UK
LaunchedJuly 2004
Length (LOA)15.3m
Working Displacement24.5 GT
Cruising Speed14 knots
Operating CodeMCA Category 2 (60 miles from safe haven day or night)

Spec Sheet: Lia