Project 636

NATO: Kilo (Improved)

Type	SS
Soviet designation	PL
NATO reporting name	Kilo (Improved)
Country	USSR
Displacement (t)	3,076
Length (m)	73.8
Beam (m)	9.9
Draft (m)	6.6
Height (m)	9.9
Max speed submerged (kn)	19.8
Max speed surfaced (kn)	12.0
Max safe depth (m)	241
Endurance (days)	45
Propeller	1 x 7 bladed propeller
Diesel-electric	Yes
Titanium hull	No
Navigation system	Andoga (Inertial Navigation System)
Class year	1990

Sensors

Sonar (9)

Name	Type	Platform	Passive range (km)	Active range (km)
MG-25	com	sub	—	—
MG-512 Vint	cav	sub	—	—
MG-518 Sever	Echo sounder	sub	—	—
MG-519	Mine detection	sub	—	1.5
MG-553 Zhgut-M	ssp		—	—
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		—	—

Radar (3)

Name	NATO name	Air search	Surface search	Fire control
MRK-50 Kaskad		—	Yes	—
MRP-25 ESM		—	—	—
Zavesa-P		—	—	—

Launchers (2)

Name	Tubes	Fire control	Max launch depth (m)
533mm Torpedo Tube (forward) 6 — 500 1982 - present: 4 x 53-65K , 6 x TEST-71M , 6 x USET-80
Signal Ejector	2	—	100

Extendable devices (8)

Name	NATO name	Capabilities	Max depth (m)	Max speed (kn)
Anis Radio Antenna	—	Radio (LF, MF, HF), Radio navigation	—	7.5
Attack periscope	—	Periscope (attack)	—	7.5
Cypress Radio Antenna	—	Radio (VLF, LF, MF, HF, VHF), Radio navigation	—	7.5
MRK-50 Kaskad Radar	—	Radar	—	7.5
MRP-25 ESM	—	ESM	—	7.5
RCP	—	Snorkel	—	7.5
Search periscope	—	Periscope (observation)	—	7.5
Zavesa RDF	—	Direction finder	—	7.5

Towed devices (1)

Name	Type	NATO name	Towed decoy	Capabilities	Cable (m)	Depth (m)	Speed (kn)
VBAU Phosphorus	Trailing wire	—	—	Receive, Radio (VLF, LF, Radio navigation)	549	91 – 37	2.3 – 9.0