Project 644

NATO: Whiskey Twin Cylinder

Type SSG
Soviet designation PLRK
NATO reporting name Whiskey Twin Cylinder
Country USSR
Displacement (t) 1,350
Length (m) 76.0
Beam (m) 6.3
Draft (m) 5.0
Height (m) 6.3
Max speed submerged (kn) 11.5
Max speed surfaced (kn) 17.5
Max safe depth (m) 200
Endurance (days) 45
Diesel-electric Yes
Titanium hull No
Class year 1955

Sensors

Sonar (4)

Name Type Platform Passive range (km) Active range (km)
Beresta ssp — —
Mars-24KIG Hull sub 0.4 —
NEL-5 Echo sounder sub — —
Tamir 5L Hull sub — 0.9

Radar (1)

Name NATO name Air search Surface search Fire control
RLK-101 Albatros Snoop Tray 1 — Yes —

Launchers (2)

Name Tubes Fire control Max launch depth (m)
533mm Torpedo Tube (forward) 4 L4-2 100
Missile Launcher 2 P-5D FCS 0
  • 1962 - present: 2 x P-5

Individual hulls (6)

Name Short name Country Start date End date Remark
S-158 S-158 USSR 1960-08-31 (Modernization from "Project 613") 1982-07-22 (Decommissioned)
S-162 S-162 USSR 1962-07-24 (Modernization from "Project 613") 1982-07-22 (Decommissioned)
S-44 S-44 USSR 1960-07-12 (Modernization from "Project 613") 1977-07-18 (Decommissioned)
S-46 S-46 USSR 1960-09-19 (Modernization from "Project 613") 1977-06-28 (Decommissioned)
S-69 S-69 USSR 1960-09-21 (Modernization from "Project 613") 1990-04-19 (Decommissioned)
S-80 S-80 USSR 1960-01-15 (Modernization from "Project 613") 1960-01-27 (Decommissioned)