Project 670 Skat

Project 670

NATO: Charlie I

Project 670 Skat

Type	SSGN
Soviet designation	PLARK
NATO reporting name	Charlie I
Country	USSR
Displacement (t)	4,430
Length (m)	95.6
Beam (m)	9.6
Draft (m)	7.8
Height (m)	9.6
Max speed submerged (kn)	26.0
Max speed surfaced (kn)	12.0
Max safe depth (m)	270
Endurance (days)	50
Propeller	1 x 5 bladed propeller
Nuclear reactors	1
Titanium hull	No
Navigation system	Sigma-670 (Automatic Dead Reckoning)
Class year	1968

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-670 250 1967 - 1967: 2 x SET-40 1968 - present: 2 x SET-40U
533mm Torpedo Tube (forward) 4 Ladoga-P-670 250 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-670 40 1969 - present: 6 x P-70 , 2 x P-70 (N)
VIPS	2	—	250

Extendable devices (6)

Name	NATO name	Capabilities	Max depth (m)	Max speed (kn)
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	—	Snorkel	—	7.5
RLK-101 Albatross Radar	—	Radar	—	7.5
Veslo-P RDF	—	Direction finder	—	7.5