Lavranos Marine Design
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Hydrographic Survey Catamaran
HYDROGRAPHIC SURVEY CATAMARAN FOR BAHRAIN
Al Masaha is a 19 metre commercial powercat designed by Wright & Lavranos and constructed in aluminum by Q-West of Wanganui. The vessel was recently launched and shipped to Bahrain in the Arabian Gulf, where she now operates as a hydrographic survey vessel. The preliminary work to gain the contract to design and build the vessel was a co-operative venture involving a number of parties.

Neville Solley of Southern Cross Marine put the contract together after a lengthy series of negotiations. Defining exact user requirements and consideration of the demanding operating conditions were key elements in the preliminary design stage, as was matching the performance required while staying within strict budget constraints. Q-West was selected as the builders on the basis of their excellent track record, cost effective approach, and first class work. The vessel was built under M&I survey with performance trials conducted by Len Gilbert and the entire project monitored by Robin Williams of MC&I on behalf of the Bahrain Government.

In the independent sea trials carried out before shipping the vessel in fact exceeded service speed at continuous rated revs by 1 knot, (21 knots at 1900 RPM) and fuel consumption was also less than the various contract speeds, allowing increased endurance. A top speed of 25 knots top (2100 RPM) was achieved in full load condition.

The powercat is very efficient as shown by the "out & back" service speed of 20 knots for 30 hours plus a survey speed of 12 knots for 50 hours while also running huge amounts of air-conditioning. She is designed to operate in maximum air temperatures of 46 deg C, and water temp of 38 deg C! Sufficient power reserves, engine room ventilation and removal of waste heat etc were important issues in the contract and design. Construction of the vessel was in marine grade aluminum, and all parts of the hull were plasma cut directly off "cut files". The interior consists of an upper flybridge with steering control station plus two instrument monitoring desks to handle the hydrographic survey systems. On the main deck level there is a comfortable saloon / mess facility, galley, double officers cabin, toilet & shower facilities. Down below in the hulls there is berthing for 6 crew, plus shower / toilet facilities. The walk in engine rooms, accessed through W/T doors give access to the Volvo 163P main engines, each putting out 550 KW (750 HP) at 2100 RPM and two Gemini Gensets of 30 & 11 KW, all supplied by Volpower.

LENGTH OVERALL 19.00 Meters
BEAM 6.80 Meters
DISPLACEMENT 42 Tonnes (fully loaded)

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lavranos@ihug.co.nz