MO-class small guard ship

MO-4-type patrol boat SKA-065 during World War II
Class overview
Name	MO class
Operators	Soviet Navy  Soviet Border Troops
Succeeded by	OD-200 class
Subclasses	MO-1, MO-2, MO-3, MO-4, BMO
Built	1935–1945
In service	1935–1945
Completed	350+
General characteristics (MO-4 type)
Type	Patrol boat / submarine chaser
Displacement	50.6 tonnes (49.8 long tons; 55.8 short tons) standard 56.5 tonnes (55.6 long tons; 62.3 short tons) full load
Length	26.9 m (88 ft 3 in)
Beam	4.02 m (13 ft 2 in)
Draught	1.35 m (4 ft 5 in)
Propulsion	3 × GAM-34BS engines Total power: 2,550 PS (2,520 shp; 1,880 kW)
Speed	26 knots (48 km/h) to 27.4 knots (50.7 km/h)
Complement	22 men
Armament	2 × 45 mm (1.8 in) 21-K guns 2 × 12.7 mm (0.50 in) DShK machine guns 2 depth charge racks (8 depth charges)

The MO (Russian: МО, an initialism for Малый охотник, Malyj okhotnik, 'Small Hunter'; nickname Мошка, Moshka, 'Midge') is a class of naval boats produced before and during World War II for the Soviet Navy and NKVD Border Troops. Their primary function originally was anti-submarine warfare. During the war they carried out many additional roles from supporting landing operations to escorting convoys. Over 350 boats were built.^[1]