Brazilian shipbuilder ETP Engenharia Ltda. this week delivered the 48Mx9.5Mx4.25M (157'6"x31'x13') offshore service vessels Baru Providencia and Baru Macura to Baru Offshore Navegacao, Rio De Janeiro. The two new 350 DWT OSVs are the third and fourth in a 12-boat contract. The Baru Gorgona and the Baru Macura have already been delivered.

Designed by Incat Crowther, the aluminum OSVs carry 40,000L (23,400 gals.) of rig water and the same amount of rig fuel. Vessel fuel is in excess of 40,000L (10,000 gals.). The rear cargo decks measures 225 sq. meters (700 sq. ft.) In addition, there is 30 sq. meters (98 sq. ft.) of cargo area inside the main deck cabin so the vessels can carry food and other supplies that need to be kept out of the elements.

Four Cummins QSK50 diesel engines, producing 1,800 hp at 1,800 rpm, provide each vessel’s main propulsion. The mains are connected to fixed pitched wheels through Twin Disc MGX-6848SC marine gears with 32.93:1 reduction ratios. The propulsion package gives the boats service speeds of 21 knots.

For additional maneuverability around offshore structures, the boats are fixed with a pair of Thrustmaster 30TT150ML 150-hp electric bowthrusters.

Ship’s service power comes from twin Cummins QSM11-EM gensets, sparking 280 kW of electrical power each.

The new OSVs have a 2.7M (8.86') draft and carry crews of 11.  

Ken Hocke has been the senior editor of WorkBoat since 1999. He was the associate editor of WorkBoat from 1997 to 1999. Prior to that, he was the editor of the Daily Shipping Guide, a transportation daily in New Orleans. He has written for other publications including The Times-Picayune. He graduated from Louisiana State University with an arts and sciences degree, with a concentration in English, in 1978.