Project 670M-1

NATO: Charlie II

Project 670M-1V

Type	SSGN
Soviet designation	PLARK
NATO reporting name	Charlie II (mod)
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		—	—
MG-519	Mine detection	sub	—	1.5
MGK-400 Rubikon Active	Hull	sub	—	4.7
MGK-400 Rubikon Cylindrical	Cylindrical	sub	2.1	—
MGK-400 Rubikon flank array	Flank	sub	2.1	—
MGK-400 Rubikon OGS	Active Intercept		—	—
NEL-6	Echo sounder	sub	—	—

Radar (1)

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

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)
Signal Ejector	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