Project 611

NATO: Zulu II

Type	SS
Soviet designation	PL
NATO reporting name	Zulu II
Country	USSR
Displacement (t)	2,387
Length (m)	90.5
Beam (m)	7.5
Draft (m)	5.0
Height (m)	12.0
Max speed submerged (kn)	16.0
Max speed surfaced (kn)	18.0
Max safe depth (m)	170
Endurance (days)	75
Propeller	3 x 4 bladed propellers, 2 x 3 bladed propellers
Diesel-electric	Yes
Titanium hull	No
Class year	1955

Sensors

Sonar (4)

Name	Type	Platform	Passive range (km)	Active range (km)
Beresta	ssp		—	—
Feniks	Hull	sub	0.9	—
NEL-5	Echo sounder	sub	—	—
Tamir 5L	Hull	sub	—	0.9

Radar (3)

Name	NATO name	Air search	Surface search	Fire control
ARP-53		—	—	—
Flag	Snoop Plate	—	Yes	—
MRP-10 Nakat		—	—	—

Launchers (3)

Name	Tubes	Fire control	Max launch depth (m)
533mm Torpedo Tube (forward) 6 L-6-4 70 Attack 1952 - 1955: 14 x 53-51 , 4 x SAET-50 1956 - 1957: 14 x 53-56 , 4 x SAET-50M 1958 - 1964: 10 x 53-56 , 4 x SAET-50M , 4 x SET-53 1965 - 1967: 10 x 53-56 , 4 x SAET-50M , 4 x SET-53M 1968 - present: 8 x 53-56 , 2 x 53-61 , 4 x SAET-50M , 4 x SET-53M Mine 1953 - 1955: 4 x 53-51 , 2 x SAET-50 1956 - 1957: 4 x 53-56 , 2 x SAET-50M 1958 - 1964: 2 x 53-56 , 2 x SAET-50M , 2 x SET-53 1965 - 1967: 2 x 53-56 , 2 x SAET-50M , 2 x SET-53M 1968 - present: 2 x 53-56 , 1 x 53-61 , 1 x SAET-50M , 2 x SET-53M
533mm Torpedo Tube (aft) 4 L-6-4 70 1952 - 1955: 4 x 53-51 1956 - present: 4 x 53-56
VIPS	1	—	200

Extendable devices (7)

Name	NATO name	Capabilities	Max depth (m)	Max speed (kn)
ARP-53 RDF	—	Direction finder	—	7.5
Attack periscope	—	Periscope (attack)	—	7.5
Flag Radar	—	Radar	—	7.5
MRP-10 Nakat ESM	—	ESM	—	7.5
RDP	—	Snorkel	—	7.5
Search periscope	—	Periscope (observation)	—	7.5
VAN Radio antenna	—	Radio (LF, MF, HF), Radio navigation	—	7.5