The six Piratini-class patrol boats are a series of patrol vessels that were built for the Brazilian Navy at the Rio de Janeiro Navy Arsenal. Based on the United States Coast Guard design, they were built between 1970 and 1971 as coastal patrol vessels. In 1993 they were moved from coastal patrol to riverine patrol.
Description Based on the United States Coast Guard design, the patrol vessels have a standard displacement of and a full load displacement of with a length between perpendiculars of , a beam of and a draught. The ships are powered by four Cummins VT-12M diesel engines driving two shafts rated at . This gives the Piratini class a maximum speed of and a range of at .
The Piratini class was initially armed with a .50 calibre machine gun mount and an mortar mount. In 1988, the 81 mm mortar mount was removed. The main armament was later altered to two machine guns and one Oerlikon cannon. They were initially designed for coastal patrol. In 1993, the class was designated for riverine patrol.
Ships in class Piratini-class patrol boatsNameHull #BuilderCommissionedStatus Piratini P 10 Arsenal de Marinha, Rio de Janeiro 30 November 1970 In service Piraja P 11 8 March 1971 In service Pampeiro P 12 16 June 1971 In service Parati P 13 29 July 1971 In service Penedo P 14 30 September 1971 In service Poti P 15 29 October 1971 In service
Service history The class was constructed as part of the offshore agreement with the United States. All six vessels were completed in 1970–1971. In 2009, Piratini, Penedo and Poti were based at Ladário Fluvial Base in Mato Grosso, the others, in Amazonas.
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