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www.seadiscovery.com Marine Technology Reporter 15 "quiet mode" at eight knots. Shutting down the two outboard generator sets and using only the two middle sets accomplish this quiet mode. While all four engines have Christie and Grey resilient mounts, the two inboard engines are also mounted on a 9,275-pound floating deck that is also resiliently mounted. In addition to the

Cummins-powered "quiet mode" gensets, the vessel contains extensive hull insula- tion, dampening tiles and custom built piping isolation hangers have been incor- porated to prevent radiated hull noise, and to limit sound pressure levels within the vessel. "This has been my biggest challenge since I worked on submarines," said

Dakota Creek Industries' project engineer

Elwood Ide, who went on to explain that the resilient mounting and sound damp- ening systems on the vessel are the com- mercial equivalent of what is put onto modern submarines. Even the bow thruster is resiliently mounted. Tankage includes 2,320 gallons (8.78 cu. m.) for water, 13,590 gallons (51.44 cu. m.) for fuel, 375 gallons (1,420 liters) for lube oil, 635 gallons (2,366 liters) for dirty oil, 725 gallons (2,744 liters) for oily water, 834 gallons (3,157 liters) for black water and 834 gallons (3,157 liters) for grey water.

Aft of the engine room and forward of the

Z-drive room is a winch room that will accommodate two winches leaving the main deck clear or with space for contain- ers to be installed. The large wheelhouse includes an aft facing control center, com- munication console and a desk for research computers in addition to a comprehensive set of navigational aids. Accommodation is provided for 8 to 10 crewmembers, up to 12 live aboard scientists and up to 30-day trip scientists. The vessel is load lined and will carry a stability letter for unrestricted

Ocean Service as an oceanographic research vessel. It is being delivered to the east coast by heavy lift ship through the

Panama Canal to off load in Florida.

Visit www.maritimeequipment.com/mt & Click No. 31 vessels

Visit www.maritimeequipment.com/mt & Click No. 209

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