Engineering:NRP Arpão (S161)

NRP Arpão in the Lisbon Naval Base
History
Portugal
Class and type:	Tridente class submarine
Name:	NRP Arpão
Builder:	HDW
Laid down:	2005
Commissioned:	22 December 2010
Status:	In active service
General characteristics
Displacement:	1,700 tons (surfaced) 2,020 tons (submerged)
Length:	67.7 m (222 ft)
Beam:	6.35 m (21 ft)
Draught:	6.6 m (22 ft)
Propulsion:	2 generators AIP Siemens Sinavy (BZM-120); 240 KW 2 diesel engines MTU 16V396 TB-94; 6,24 MW 1 electric engine Siemens Permasyn; 2,85 MW 1 axis
Speed:	20 knots (37 km/h) submerged 10 knots (19 km/h) surfaced 6 knots (11 km/h) AIP system
Range:	12,000 nautical miles (22,000 km) at 8 knots (15 km/h)
Endurance:	60 days
Test depth:	superior to 300 m (984 ft)
Capacity:	14 marines
Complement:	33 men: 7 officers 10 sergeants 16 sailors
Sensors and processing systems:	Kelvin Hughes KH-1007 (F) navigation radar Atlas Elektronik GmbH ISUS 90 combat management system
Armament:	8 × 533 mm torpedo tubes 12 × Alenia Marconi Systems IF-21 Blackshark torpedo reloads 6 × Sub-Harpoon UGM 84 capable

NRP Arpão (S161) is a Tridente-class attack submarine of the Portuguese Navy. It was commissioned in 2010.