Project 675

NATO: Echo II

Project 675

Type SSGN
Soviet designation PLARK
NATO reporting name Echo II
Country USSR
Displacement (t) 6,000
Length (m) 115.4
Beam (m) 9.3
Draft (m) 6.7
Height (m) 9.3
Max speed submerged (kn) 22.7
Max speed surfaced (kn) 14.0
Max safe depth (m) 241
Endurance (days) 60
Nuclear reactors 2
Titanium hull No
Class year 1962

Sensors

Sonar (6)

Name Type Platform Passive range (km) Active range (km)
MG-10 Kola Cylindrical sub 0.9 —
MG-13 Active Intercept — —
MG-200 Arktika Hull sub — 1.3
MG-23 Beresta-M ssp — —
NEL-6 Echo sounder sub — —
Plutoniy Mine hunting sub — 0.9

Radar (4)

Name NATO name Air search Surface search Fire control
Argument Front Door — — —
ARP-53 — — —
MRP-10 Nakat — — —
RLK-101 Albatros Snoop Tray 1 — Yes —

Launchers (4)

Name Tubes Fire control Max launch depth (m)
400mm Torpedo Tube (aft) 2 Ladoga 250
533mm Torpedo Tube (forward) 4 Ladoga 100
Missile Launcher 8 Argument 0
Signal Ejector 2 — 200

Extendable devices (11)

Name NATO name Capabilities Max depth (m) Max speed (kn)
Argument FC Radar — Fire control — 6.5
ARP-53 RDF — Direction finder — 6.5
Attack periscope — Periscope (attack) — 6.5
Bow hydroplanes — Bow hydroplanes — 6.5
Graphite-1 Radio antenna — Radio (VHF) — 6.5
Iskra-1 Radio antenna — Radio (LF, MF, HF), Radio navigation — 6.5
MRP-10 Nakat ESM — ESM — 6.5
PR-14 Astrocorrector — Periscope (astro) — 6.5
PZNG-10 Search periscope — Periscope (observation) — 6.5
RDP — Snorkel — 6.5
RLK-101 Albatross Radar — Radar — 6.5

Individual hulls (29)

Name Short name Country Start date End date Remark
K-1 K-1 USSR 1964-09-30 (Commissioned) 1981-12-15 (Modernization to "Project 675MKV")
K-10 K-10 USSR 1966-10-15 (Modernization from "Project 675MKV") 1985-08-19 (Decommissioned)
K-104 K-104 USSR 1963-12-15 (Commissioned) 1977-11-10 (Modernization to "Project 675MK")
K-108 K-108 USSR 1967-03-31 (Commissioned) 1990-03-29 (Decommissioned)
K-116 K-116 USSR 1965-10-29 (Commissioned) 1985-02-22 (Decommissioned)
K-125 K-125 USSR 1965-12-18 (Commissioned) 1971-02-02 (Modernization to "Project 675K")
K-128 K-128 USSR 1966-08-25 (Commissioned) 1978-12-21 (Modernization to "Project 675MK")
K-131 K-131 USSR 1966-09-30 (Commissioned) 1994-01-20 (Decommissioned)
K-135 K-135 USSR 1966-11-25 (Commissioned) 1988-03-22 (Decommissioned)
K-166 K-166 USSR 1963-10-31 (Commissioned) 1989-10-20 (Decommissioned)
K-170 K-170 USSR 1963-12-26 (Commissioned) 1991-05-10 (Decommissioned)
K-172 K-172 USSR 1964-07-30 (Commissioned) 1990-06-20 (Decommissioned)
K-175 K-175 USSR 1963-12-30 (Commissioned) 1974-02-25 (Modernization to "Project 675MK")
K-184 K-184 USSR 1964-03-31 (Commissioned) 1975-10-22 (Modernization to "Project 675MK")
K-189 K-189 USSR 1965-07-24 (Commissioned) 1976-12-01 (Modernization to "Project 675MK")
K-22 K-22 USSR 1965-08-07 (Commissioned) 1977-04-08 (Modernization to "Project 675MKV")
K-23 K-23 USSR 1967-12-30 (Commissioned) 1979-03-02 (Modernization to "Project 675MK")
K-28 K-28 USSR 1964-12-16 (Commissioned) 1968-10-21 (Modernization to "Project 675MU")
K-31 K-31 USSR 1965-09-30 (Commissioned) 1987-04-30 (Decommissioned)
K-34 K-34 USSR 1968-12-30 (Commissioned) 1982-11-24 (Modernization to "Project 675MKV")
K-35 K-35 USSR 1965-06-30 (Commissioned) 1986-08-01 (Modernization to "Project 675MKV")
K-47 K-47 USSR 1964-08-31 (Commissioned) 1972-01-01 (Modernization to "Project 675K")
K-48 K-48 USSR 1965-12-31 (Commissioned) 1990-10-21 (Decommissioned)
K-56 K-56 USSR 1966-08-26 (Commissioned) 1979-08-09 (Modernization to "Project 675MK")
K-57 K-57 USSR 1965-10-31 (Commissioned) 1977-06-27 (Modernization to "Project 675MK")
K-7 K-7 USSR 1967-09-30 (Commissioned) 1990-09-30 (Decommissioned)
K-74 K-74 USSR 1965-07-30 (Commissioned) 1992-08-28 (Decommissioned)
K-90 K-90 USSR 1965-09-25 (Commissioned) 1989-12-20 (Decommissioned)
K-94 K-94 USSR 1966-12-27 (Commissioned) 1972-10-28 (Modernization to "Project 675MK")