ORP Mazur (1954)

	Polish M-class submarines in port
History
Soviet Navy
Name	M-236
Builder	Krasnoye Sormovo Factory No. 112, Gorky; Sudomekh Shipyard, Leningrad;
Laid down	19 February 1947
Launched	19 June 1948
Commissioned	19 October 1948
Decommissioned	30 April 1954
Poland
Name	ORP Mazur
Commissioned	25 September 1954
Decommissioned	15 March 1965
Fate	Scrapped
General characteristics
Class & type	M-XV submarine
Displacement	surfaced: 283 t (279 long tons); submerged: 353 t (347 long tons);
Length	49.5 m (162 ft 5 in)
Beam	4.4 m (14 ft 5 in)
Draft	2.6–2.8 m (8 ft 6 in – 9 ft 2 in)
Propulsion	2 diesel engines, 441 kW (591 hp) each; 2 electric motors, 160 kW (210 hp) each; 2 propellers;
Speed	surfaced: 15.7 kn (29.1 km/h; 18.1 mph); submerged: 7.8 kn (14.4 km/h; 9.0 mph);
Range	surfaced: 4,500 nmi (8,300 km; 5,200 mi) at 8 kn (15 km/h; 9.2 mph); submerged: 85 nmi (157 km; 98 mi) at 2.9 kn (5.4 km/h; 3.3 mph);
Complement	31
Armament	1 universal gun, 45 mm (1.8 in) caliber; 4 torpedoes; torpedo tubes: 4 × 533 mm (21.0 in);

ORP Mazur was a Polish Cold War-era submarine, originally the Soviet M-236, one of six M-XV-series (Project 96) vessels of the M type acquired by Poland. It displaced 283 tonnes (279 long tons) surfaced and 353 t (347 long tons) submerged, with its primary armament consisting of four 533-millimetre (21.0 in) torpedoes launched from four internal torpedo tubes. The submarine achieved a surface speed exceeding 15 knots (28 km/h; 17 mph), with a range of 4,500 nautical miles (8,300 km; 5,200 mi) at 8 knots (15 km/h; 9.2 mph).

Launched on 19 June 1948 at Krasnoye Sormovo Factory No. 112 in Gorky and completed at the Sudomekh Shipyard in Leningrad, it entered service with the Soviet Navy on 19 October 1948, assigned to the Baltic Fleet. In 1954, Poland leased the vessel, commissioning it into the Polish Navy on 25 September 1954. Designated with pennant numbers M-101, P-101, and later 302, it served extensively until decommissioned on 15 March 1965 and was subsequently scrapped.