Project 670M-1

NATO: Charlie II

Project 670M-1

Type	SSGN
Soviet designation	PLARK
NATO reporting name	Charlie II
Country	USSR
Displacement (t)	5,570
Length (m)	104.9
Beam (m)	9.6
Draft (m)	7.8
Height (m)	9.6
Max speed submerged (kn)	24.0
Max speed surfaced (kn)	12.0
Max safe depth (m)	250
Endurance (days)	50
Propeller	1 x 8 bladed propeller
Nuclear reactors	1
Titanium hull	No
Navigation system	Sigma-670 (Automatic Dead Reckoning)
Class year	1973

Sensors

Sonar (8)

Name	Type	Platform	Passive range (km)	Active range (km)
MG-25	com	sub	—	—
MG-43 Gorizont	ssp		—	—
MGK-100 Kerch Active	Hull	sub	—	3.4
MGK-100 Kerch Cylindrical	Cylindrical	sub	1.7	—
MGK-100 Kerch flank array	Flank	sub	2.1	—
MGK-100 Kerch Mine Detection	Mine detection	sub	—	1.3
MGK-100 Kerch OGS	Active Intercept		—	—
NEL-6	Echo sounder	sub	—	—

Radar (3)

Name	NATO name	Air search	Surface search	Fire control
MRP-21 Zaliv-P		—	—	—
RLK-101 Albatros	Snoop Tray 1	—	Yes	—
Veslo-P		—	—	—

Launchers (4)

Name	Tubes	Fire control	Max launch depth (m)
400mm Torpedo Tube (forward) 2 Ladoga-P-670M 250 1967 - 1967: 2 x SET-40 1968 - present: 2 x SET-40U
533mm Torpedo Tube (forward) 4 Ladoga-P-670M 250 1967 - 1967: 0 x 53-56 , 0 x 53-57 , 4 x 53-61 , 8 x SET-65 1968 - 1968: 0 x 53-56 , 0 x 53-57 , 4 x 53-61 , 8 x SET-65 1969 - 1971: 0 x 53-56 , 0 x 53-57 , 4 x 53-61M , 8 x SET-65 1972 - 1985: 4 x 53-65K , 8 x SET-65M 1986 - present: 4 x 53-65K , 8 x SET-65K
Missile Launcher 8 Dunay-670M 60 1969 - present: 6 x P-120 , 2 x P-120 (N)
VIPS	2	—	100

Extendable devices (7)

Name	NATO name	Capabilities	Max depth (m)	Max speed (kn)
Anis Radio Antenna	—	Radio (VLF), Radio navigation	—	7.5
Iskra-1 Radio antenna	—	Radio (LF, MF, HF), Radio navigation	—	7.5
MRP-21 Zaliv-P ESM	—	ESM	—	7.5
PZNS-10 Search periscope	—	Periscope (observation)	—	7.5
RKP + UHF Satcom	—	Radio (UHF), Navsat, Satcom, Snorkel	—	7.5
RLK-101 Albatross Radar	—	Radar	—	7.5
Veslo-P RDF	—	Direction finder	—	7.5

Towed devices (1)

Name	Type	NATO name	Towed decoy	Capabilities	Cable (m)	Depth (m)	Speed (kn)
VVABT Paravan	Trailing buoy	—	—	Receive, Radio (VLF)	300	150 – 50	3.0 – 12.0