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November 2010 www.marinelink.com 71 Sistac Sistemas in Brazil have selected twin UltraJet UJ575 waterjets to power its new diving vessel Sistac Esperança. Having provided services to the offshore industry since 1995 Sistac Sistemas de Acesso S/A saw the opportunity to pro- vide an offshore dive operation center and proceeded to commission a new Off- shore Dive Sup- port Vessel. Designed by the Federal Univer- sity of Rio de Janeiro this 25m aluminum dive support vessel is unique in its de- sign. The alu- minum semi-planning hull design matches load capacity to fuel consump- tion at excellent speed. The load capac- ity is needed to carry all equipment and fuel on board. The vessel cruises at 11 knots consuming 185 l/h. The increased fuel efficiency allows it to spend more time at diving sites, with the waterjet propulsion system providing ultimate control for variable loads and sea condi- tions, at even lower fuel consumption rates. The Sistac Esperança was built by Seasafe Barcos Manufaturados, a spe- cialist aluminum boat builder based in Angra dos Reis, Brazil. It is fitted with all the necessary gear for offshore diving, in- cluding a decompression chamber and dive-bell which is launched from the transom by an A-frame crane. Accommodation includes 4 com- fortable cabins for 4 crew or passengers in each. With an onboard diving crew of 10, the Sistac Esperança is also equipped to carry out ROV operations. From the onboard dive control room, the dive supervisor has total control over both the divers and ROV. The vessel is capable of operating for 15 days, 200 miles off the coast, with- out the need of external supply. Electri- cal power is supplied by a pair of Caterpillar C9 175 kW generators. Fresh water is produced on board at 1400gpd rate in a reverse osmosis water-maker. The craft has a maximum displacement of 100 tons when fully loaded. Powered by twin Caterpillar 3142E engines rated 634 kW (850 bhp) at 2300 rpm coupled to twin UltraJet 575 waterjets via ZF550 1.743:1 gearboxes, the craft has a top speed of 14 knots and a cruising speed of 11 knots. The Sistac Esperança was de- livered to Sistac in August 2010, starting a new fleet of offshore vessels that will be in service in the Brazilian Campos Basin. www.seasafe.com.br New Crewboat for Tidewater in Brazil Brazil is one of the bright spots for shipyards in the current global ecomomy. The Industria Naval do Cear S. A. INACE has been making a name for itself as a qual- ity producer since the 1960s. The yard is located in Fortaleza, Cear’ State, Brazil and is a leading builder of steel and aluminum yachts for both the domestic and U.S. markets. The yard is also a significant player in vessel construction in support of Brazil’s booming offshore oil industry. An example of the quality work being done there is the recently delivered Karen Tide II. The first of two fast supply vessels for Tidewater Inc. the 51.8-m (170-ft.) by 10.4-m (34-ft.) vessel is finished to very high standards in all areas from the wheelhouse to passenger areas, crews quarters and the engine room. The main engines, supplied by Distribuidora Cummins do Nordesto, are four Cummins KTA50 M2 diesels each generating 1342 kW of power and turning 1422 by 1295-m/m four-blade propellers through ZF4650 gears with 3.04:1 ratios. The Karen Tide II achieved speeds of 21-knots on sea trails. Capac- ities for the ABS-classed vessel include seating for 50 passengers, tankage for 99.3 cu. m. of water and 293.64 cu. m. of diesel fuel. The cargo deck’s 269.42 cubic meter open space can carry up to 371 metric tons. Sistac Sistemas to Build 25m DSV
