Osa-class missile boat

Osa I (Project 205) craft
Osa I (Project 205) craft
Class overview
NameOsa class
BuildersVostochnaya Verf
Operatorssee below
Preceded byKomar-class missile boat
Succeeded byTarantul-class corvette
SubclassesOsa I, Osa II
Built1960–1973
In service1960–present
Completed400+
General characteristics
TypeMissile boat
Displacement
  • Osa I
  • 171.5 (with M-504B – 184) tons standard
  • 209 (with M-504B – 226) tons full load
  • Osa II
  • 192 tons standard
  • 235 tons full load
Length38.6 m (127 ft)
Beam7.64 m (25.1 ft)
Draught1.73 m (5.7 ft) (with M-504B – 1.84 m (6.0 ft))
Installed power
  • 3 × 4,000 hp (3.0 MW) M-503G diesel engines (205)
  • 3 × 5,000 hp (3.7 MW) M-504B diesel engines (205U onwards)
Propulsion3 shafts
Speed
  • 38.5 knots (71.3 km/h) (M-503G)
  • 42 knots (78 km/h) (M-504B)
Range
  • 1,800 nmi (3,300 km) at 14 knots (26 km/h),
  • 800 nmi (1,500 km) at 30 knots (56 km/h),
  • 500 nmi (930 km) at 35 knots (65 km/h)
Endurance5 days
Complement
  • 28 (4 officers) (Osa I)
  • 29 (4 officers) (Osa II)
Sensors and
processing systems
  • MR-331 Rangout (Square Tie) radar
  • Klyon fire-control system for P-15 Termit
  • Nickel IFF
  • MR-104 Rys (Drum Tilt) fire-control radar for AK-230
  • ARP-58SV radio direction finder
Electronic warfare
& decoys
Nikhrom-RRM IFF/ESM
Armament

The Project 205 Moskit[1] (mosquito) more commonly known by their NATO reporting name Osa, are a class of missile boats developed for the Soviet Navy in the late 1950s. Until 1962 this was classified as a large torpedo boat.

The Osa class is probably the most numerous class of missile boats ever built, with over 400 vessels constructed between 1960 and 1973 for both the Soviet Navy and for export to allied countries. Osa means wasp in Russian,[citation needed] but it is not an official name. The boats were designated as "large missile cutters" in the Soviet Navy.

  1. ^ Russian: Проект 205 «Москит»