Dobrynya Nikitich-class icebreaker

	Ivan Kruzenstern showing the rounded tumblehome hull of the Dobrynya Nikitich-class icebreakers
Class overview
Name	Dobrynya Nikitich class (various Project 97 variants); Ivan Susanin class (Project 97P);
Builders	Admiralty Shipyard (Leningrad, USSR)
Operators	Various
Subclasses	97 (icebreaker); 97А (icebreaker); 97K (icebreaker); 97E (icebreaker); 97AP (patrol icebreaker); 97P (patrol ship); 97D (hydrographic survey vessel); 97B (hydrographic survey vessel); 97N (research vessel);
Built	1960–1981
In service	1960–present
Completed	32
Active	7
Laid up	1
Lost	1
Scrapped	22
Preserved	1
General characteristics
Type	Icebreaker
Displacement	2,935 t (2,889 long tons); 3,350 t (3,300 long tons) (97AP);
Length	67.7 m (222 ft)
Beam	18.1 m (59 ft)
Draught	5.35 metres (17.6 ft); 6.3 m (21 ft) (97AP);
Installed power	3 × 13D100 (3 × 1,800 hp)
Propulsion	Diesel–electric; three shafts (2 × 2,400 hp + 1,600 hp)
Speed	14 knots (26 km/h; 16 mph) (maximum)
Range	5,500 nautical miles (10,200 km; 6,300 mi); 6,700 nautical miles (12,400 km; 7,700 mi) (97AP);
Endurance	17 days
Crew	42
Armament	1 × twin 57 mm ZIF-31-B (97 and 97AP); 1 × twin 25 mm 2M-3M (97 and 97AP);

Dobrynya Nikitich class, also known by its Soviet designation Project 97, is a diverse series of diesel–electric icebreakers and other icebreaking vessels built in the Soviet Union. In total, 32 vessels were built in various configurations for both civilian and naval service in the 1960s, 1970s and early 1980s, and several remain in service in Russia as of 2024.

Western sources refer to the Project 97 vessels using two different names: Dobrynya Nikitich class for the various icebreaker variants and more heavily-modified derivative designs, and Ivan Susanin class specifically for Project 97P patrol ships.

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