Sheksna on 1 June 1993
Class overview
Name	Project 577 (NATO: Uda Class)
Builders	Vyborg
Operators	Soviet Navy  Russian Navy  Indonesian Navy
Built	1962–1967
In commission	1962–present
Completed	9
General characteristics
Type	Replenishment oiler
Displacement	7,100 tons full load
Length	121.9 m (399 ft 11 in)
Beam	16.0 m (52 ft 6 in)
Draught	6.3 m (20 ft 8 in)
Propulsion	2 Type 58D diesels 8,000 bhp (6,000 kW) 1 shaft
Speed	17 knots (31 km/h; 20 mph)
Range	4,000 nmi (7,400 km; 4,600 mi) at 15 knots (28 km/h; 17 mph)
Endurance	30-days
Capacity	2,000 tons fuel oil 800 tons distillate fuel 100 tons lube oil 300 tons feedwater 200 tons potable water 100 tons stores
Complement	74
Sensors and processing systems	2 Don-2 (navigation) 1 Palm Frond (navigation)
Electronic warfare & decoys	IFF
Armament	removed

The Uda class, Soviet designation Project 577, is a class of replenishment oiler built for the Soviet Navy between 1962 and 1967.

Construction

Project 577 vessels were built at the Vyborg, USSR shipyard during the 1960s and were designated VTR Voyenyy Tanker, Military Tanker) by the Soviet Navy. They are capable of replenishment at sea and an A-frame kingpost provides two amidships refueling positions. They are also capable of refueling over the stern.^[1][2][3]

The Project 577 is similar in design to a US Navy AO fleet tanker or a Royal Fleet Auxiliary fleet support tanker and performs the same operational role. Unlike US or British vessels of this type, the Project 577 does not have facilities for helicopters and is incapable of vertical replenishment.^[4][5][6]

There are provisions for fitting eight ZIF-75 57mm AA guns in quad mounts, plus one MR-302 Strut Curve and two MR-103 Bars radar, but no weapons systems have been reported fitted to the Uda class since the 1960s.^[7][8][9]

Ships in class

There were nine vessels in the class.^[10][11][12]