Piratini-class patrol boat

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 Cape-class cutter design, they were built between 1970–1971 as coastal patrol vessels. In 1993 they were moved from coastal patrol to riverine patrol.

Class overview
Name: Piratini class
Operators:  Brazilian Navy
In commission: 1971–present
Completed: 6
Active: 6
General characteristics
Type: Patrol vessel
Displacement: 105 long tons (107 t) standard
Length: 29.0 m (95 ft 2 in)
Beam: 5.8 m (19 ft 0 in)
Draught: 2.0 m (6 ft 7 in)
Installed power:
Propulsion: 2 shafts
Speed: 17 knots (31 km/h; 20 mph)
Range: 1,700 nmi (3,148 km; 1,956 mi) at 12 knots (22 km/h; 14 mph)
Complement: 15
Armament:

Description

Based on the United States Coast Guard Cape-class cutter design, the patrol vessels have a standard displacement of 105 long tons (107 t) and a full load displacement of 146 long tons (148 t) with a length between perpendiculars of 29.0 m (95 ft 2 in), a beam of 5.8 m (19 ft 0 in) and a 2.0 m (6 ft 7 in) draught.[1][2] The ships are powered by four Cummins VT-12M diesel engines driving two shafts rated at 1,100 brake horsepower (820 kW). This gives the Piratini class a maximum speed of 17 knots (31 km/h; 20 mph) and a range of 1,700 nautical miles (3,148 km; 1,956 mi) at 12 knots (22 km/h; 14 mph).[3][1]

The Piratini class was initially armed with a .50 calibre machine gun mount and a 81 mm (3.2 in) mortar mount.[3] In 1988, the 81 mm mortar mount was removed.[1] The main armament was later altered to two 12.7 mm (0.50 in) machine guns and one 20 mm (0.79 in) Oerlikon cannon.[2] They were initially designed for coastal patrol. In 1993, the class was designated for riverine patrol.

Ships in class
Piratini-class patrol boats[2]
Name Hull # Builder Commissioned Status
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.[3] In 2009, Piratini, Penedo and Poti were based at Ladário Fluvial Base in Mato Grosso, the others, in Amazonas.[2]

Citations
  1. Sharpe 1990, p. 62.
  2. Saunders 2009, p. 80.
  3. Gardiner, Chumbley & Budzbon 1995, p. 36.

References
  • Gardiner, Robert; Chumbley, Stephen & Budzbon, Przemysław, eds. (1995). Conway's All the World's Fighting Ships 1947–1995. Annapolis, Maryland: Naval Institute Press. ISBN 1-55750-132-7.CS1 maint: ref=harv (link)
  • Sharpe, Richard, ed. (1990). Jane's Fighting Ships 1990–91 (93 ed.). Surrey, United Kingdom: Jane's Information Group. ISBN 0-7106-0904-3.CS1 maint: ref=harv (link)
  • Saunders, Stephen, ed. (2009). Jane's Fighting Ships 2009–2010 (112 ed.). Alexandria, Virginia: Jane's Information Group Inc. ISBN 0-7106-2888-9.CS1 maint: ref=harv (link)
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