Petya-class frigate

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HQ-15, a Petya-class frigate of the Vietnam People's Navy in 2017
Class overview
Name	Petya class (Project 159)
Operators	Soviet Navy (historical)  Azerbaijani Navy  Egyptian Navy (former)  Ethiopian Navy (former)  Indian Navy (former)  Syrian Arab Navy (former)  Ukrainian Navy (former)  Vietnam People's Navy
Preceded by	Riga class
Succeeded by	Mirka class
Subclasses	Arnala-class corvettes
Completed	54
Active	6
Laid up	1 (uncertain)
Retired	48
General characteristics
Type	Frigate
Displacement	950 tons (standard) 1,150 tons (full load)
Length	81.8 m (268 ft 4 in)
Beam	9.2 m (30 ft 2 in)
Draught	2.9 m (9 ft 6 in)
Propulsion	2 shaft CODAG 2 gas turbines - 30,000 hp (22,000 kW) 1 diesel - 6,000 hp (4,500 kW)
Speed	30 knots (56 km/h; 35 mph)
Range	4,870 nautical miles (9,020 km; 5,600 mi) at 10 knots (19 km/h; 12 mph) 450 nautical miles (830 km; 520 mi) at 30 knots (56 km/h; 35 mph)
Complement	90
Sensors and processing systems	Radar Don-2 Slim Net Hawk Screech Sonar - Herkules hull mounted & dipping sonar
Armament	4 76 mm (3 in) guns (2x2) 4 RBU-6000 anti-submarine rocket launchers (2 in some ships) 5 406 mm (16 in) anti-submarine torpedo tubes (10 tubes in some ships) export version had 1x3 533 mm (21 in) torpedo tubes

The Petya class was the NATO reporting name for a class of light frigates designed in the 1950s and built for the Soviet Navy in the 1960s. The Soviet designation was "Storozhevoi Korabl`" (Сторожевой Корабль - Sentry Ship) Project 159.