Project 675

NATO: Echo II

Project 675 (1963)

Project 675 (1963)

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
Propeller	2 x 6 bladed propellers
Nuclear reactors	2
Titanium hull	No
Navigation system	Sila-N-675 (Automatic Dead Reckoning)
Class year	1963

Sensors

Sonar (7)

Name	Type	Platform	Passive range (km)	Active range (km)
MG-10 Kola	Cylindrical	sub	0.9	—
MG-13 Svet	Active Intercept		—	—
MG-15	com	sub	—	—
MG-200 Arktika	Hull	sub	—	1.3
MG-23 Beresta-M	ssp		—	—
NEL-6	Echo sounder	sub	—	—
Plutoniy	Hull	sub	—	0.9

Radar (4)

Name	NATO name	Air search	Surface search	Fire control
Argument	Front Door	—	—	Yes
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

Leningrad-675

250

1962 - 1967: 2 x SET-40
1968 - present: 2 x SET-40U

533mm Torpedo Tube (forward)

4

Leningrad-675

100

1958 - 1960: 2 x 53-56 , 2 x SAET-50M , 6 x SET-53
1961 - 1963: 0 x 53-56 , 0 x 53-57 , 2 x 53-61 , 2 x SAET-60 , 6 x SET-53
1964 - 1964: 0 x 53-56 , 0 x 53-57 , 2 x 53-61 , 2 x SAET-60 , 6 x SET-53M
1965 - 1968: 0 x 53-56 , 0 x 53-57 , 2 x 53-61 , 2 x SAET-60 , 6 x SET-65
1969 - present: 2 x 53-65K , 2 x SAET-60M , 6 x SET-65M

Missile Launcher

8

Argument

0

Default

1962 - present: 8 x P-6 , 0 x P-6 (N)

Nuclear

1962 - present: 6 x P-6 , 2 x P-6 (N)

VIPS

2

—

200

Extendable devices (11)

Name	NATO name	Capabilities	Max depth (m)	Max speed (kn)
Argument FC Radar	—	Fire control	—	7.5
ARP-53 RDF	—	Direction finder	—	7.5
Attack periscope	—	Periscope (attack)	—	7.5
Bow hydroplanes	—	Bow hydroplanes	—	7.5
Graphite-1 Radio antenna	—	Radio (VHF)	—	7.5
Iskra-1 Radio antenna	—	Radio (LF, MF, HF), Radio navigation	—	7.5
MRP-10 Nakat ESM	—	ESM	—	7.5
PR-14 Astrocorrector	—	Periscope (astro)	—	7.5
PZNG-10 Search periscope	—	Periscope (observation)	—	7.5
RDP	—	Snorkel	—	7.5
RLK-101 Albatross Radar	—	Radar	—	7.5

Individual hulls (9)

Name	Short name	Country	Start date	End date	Remark
K-1	K-1	USSR	1964-09-30 (Commissioned)	1966-01-01 (Modernization to Project 675 (1965))
K-104	K-104	USSR	1963-12-15 (Commissioned)	1965-01-01 (Modernization to Project 675 (1965))
K-166	K-166	USSR	1963-10-31 (Commissioned)	1965-01-01 (Modernization to Project 675 (1965))
K-170	K-170	USSR	1963-12-26 (Commissioned)	1965-01-01 (Modernization to Project 675 (1965))
K-172	K-172	USSR	1964-07-30 (Commissioned)	1966-01-01 (Modernization to Project 675 (1965))
K-175	K-175	USSR	1963-12-30 (Commissioned)	1965-01-01 (Modernization to Project 675 (1965))
K-184	K-184	USSR	1964-03-31 (Commissioned)	1966-01-01 (Modernization to Project 675 (1965))
K-28	K-28	USSR	1964-12-16 (Commissioned)	1966-01-01 (Modernization to Project 675 (1965))
K-47	K-47	USSR	1964-08-31 (Commissioned)	1966-01-01 (Modernization to Project 675 (1965))