Dekabrist-class submarine

D-3 Krasnogvardyeyets on a Soviet stamp
Class overview
Name:	Dekabrist
Builders:	3 at Ordzhonikidze Shipyard, Leningrad 3 at Marti Yard, Nikolayev
Operators:	Soviet Navy
Built:	1927-1929
In service:	1928-1958
Completed:	6
Lost:	4
Preserved:	1
General characteristics
Type:	diesel/electric-powered attack submarine
Displacement:	933 tons surfaced 1,354 tons submerged
Length:	76.00 m (249 ft 4 in)
Beam:	6.5 m (21 ft)
Draught:	3.80 m (12.5 ft)
Propulsion:	2 shafts, three-bladed propellers - Two 1,100hp MAN/Kolomna diesels - Two 525hp PG-20 electric motors - Two electric creeping motors 50hp - 60 DK storage batteries
Speed:	14 knots (26 km/h) surfaced 9 knots (17 km/h) submerged
Range:	3,600 nmi (6,700 km) at 14 kn (26 km/h) surfaced 7,500 nmi (13,900 km) at 9 kn (17 km/h) surfaced 132 nmi (244 km) at 2 kn (3.7 km/h) submerged
Test depth:	295 ft (90 m)
Complement:	53 officers and crew
Armament:	8 21-inch (533 mm) torpedo tubes (6 bow, 2 stern), 14 torpedoes carried 1 × 100mm/51 cal. Main deck gun 1 × 45mm/46 cal. K-21 AA gun 1 × 7.62 machine-gun

The Dekabrist-class were the first class of submarines built for the Soviet Navy after the October Revolution. They were authorized in the Soviet Naval Shipbuilding Program of 1926.

Operational-tactical requirements and design concepts were formulated in 1923. In 1925 a Soviet naval mission had obtained blueprints for the Balilla-class submarine from the Italians: concepts from that design were used together with Soviet ideas. The boats were constructed by the Ordzhonikidze Shipyard and the principal designer was B.M. Malinin. The first boat in the class was laid down on March 5, 1927; launched on November 3, 1928, and commissioned on November 18, 1930. This first boat, Dekabrist, was later designated D-1 on September 15, 1934.

The class was of a double–hull design with 7 compartments and constructed using riveting. These boats were of Soviet design and had numerous technical shortcomings and construction defects. The most serious problems were their slow diving time and poor stability during diving.

In May 1933, Dekabrist was shifted to the Northern Fleet via the White Sea-Baltic Canal. She remained in service until 1940. She showed high seaworthiness in polar circumstances. The boat was lost with her entire crew in a diving accident on November 13, 1940 in Motovsky Gulf.