Soviet submarine Shch-307

	Shch-307's conning tower
History
Soviet Union
Name	Shch-307
Ordered	mid-1933
Builder	Baltic Works, Leningrad
Laid down	6 November 1933
Launched	1 August 1934
Commissioned	4 August 1935
Decommissioned	23 April 1948
Renamed	From Treska, 15 September 1934; PZS-5, 1949;
Stricken	8 April 1957
Status	Scrapped after 8 April 1957, Conning tower preserved as memorial in Moscow
General characteristics
Class & type	Series V-bis-2 Shchuka-class submarine
Displacement	591 t (582 long tons) (surfaced); 708 t (697 long tons) (submerged);
Length	58.75 m (192 ft 9 in)
Beam	6.20 m (20 ft 4 in)
Draught	4.22 m (13 ft 10 in) (mean)
Installed power	1,010 kW (1,370 PS) (diesel); 590 kW (800 PS) (electric);
Propulsion	2-shaft diesel electric; 2 diesel engines; 2 electric motors;
Speed	13.5 knots (25.0 km/h; 15.5 mph) (surfaced); 8 knots (15 km/h; 9.2 mph) (submerged);
Range	5,100 nmi (9,400 km; 5,900 mi) at 8.35 knots (15.46 km/h; 9.61 mph); 104 nmi (193 km; 120 mi) at 2.74 knots (5.07 km/h; 3.15 mph) (submerged);
Test depth	75 m (246 ft)
Complement	39
Armament	4 × bow 533 mm (21 in) torpedo tubes; 2 × stern 533 mm (21 in) torpedo tubes; 2 × 45 mm (1.8 in) deck guns;

Shch-307 (Russian: Щ-307) was a Series V-bis-2 Shchuka-class submarine built for the Soviet Navy during the 1930s with the name of Treska. Renamed Shch-307 while under construction in 1934, she was completed the following year. The boat was assigned to the Baltic Fleet and participated in the defense of the Soviet Union after the Axis powers invaded in June 1941 (Operation Barbarossa). The ship played a minor role during the evacuation of Tallinn, Estonia, in August. Shch-307 made only four war patrols during the war, but sank a German submarine in 1941. After the war, the boat was decommissioned in 1948, renamed PZS-5 and converted into a floating charging station the following year. She was stricken from the navy list in 1957 and subsequently scrapped, although her conning tower was preserved as a memorial.