Project 705 Lira

Project 705

NATO: Alfa

Project 705 Lira

Type	SSN
Soviet designation	PLA
NATO reporting name	Alfa
Country	USSR
Displacement (t)	3,150
Length (m)	81.4
Beam (m)	9.5
Draft (m)	6.2
Height (m)	9.5
Max speed submerged (kn)	40.2
Max speed surfaced (kn)	12.0
Max safe depth (m)	351
Endurance (days)	50
Nuclear reactors	1
Titanium hull	Yes
Class year	1972

Sensors

Sonar (8)

Name	Type	Platform	Passive range (km)	Active range (km)
MG-1006 Zhgut	ssp		—	—
MG-512 Vint-705	cav	sub	—	—
MG-519	Mine hunting	sub	—	1.5
MGK-1001 Yenisey Active	Hull	sub	—	4.7
MGK-1001 Yenisey AIR	Active Intercept		—	—
MGK-1001 Yenisey Cylindrical	Cylindrical	sub	2.1	—
MGK-1001 Yenisey flank array	Flank	sub	2.1	—
NEL-6	Echo sounder	sub	—	—

Radar (3)

Name	NATO name	Air search	Surface search	Fire control
MRK-55 Chibis		—	Yes	—
MRK-55 Chibis ESM		—	—	—
Veslo-P		—	—	—

Launchers (2)

Name	Tubes	Fire control	Max launch depth (m)
533mm Torpedo Tube (forward) 6 Sargan 350 1971 - 1980: 2 x 53-65A , 2 x RPK-2 Vyuga (81R) , 2 x SAET-60A , 10 x SET-65A 1981 - present: 2 x 53-65A , 2 x RPK-2 Vyuga (81R) , 2 x SAET-60A , 10 x SET-65A
Signal Ejector	2	—	100

Extendable devices (5)

Name	NATO name	Capabilities	Max depth (m)	Max speed (kn)
MRK-55 Chibis radar	—	Radar, ESM	—	6.5
Periscope	—	Periscope (observation)	—	6.5
RKP + Quince Radio Antenna	—	Radio (LF, MF, HF), Radio navigation, Snorkel	—	6.5
Topol Radio Antenna	—	Radio (VLF), Radio navigation	—	6.5
Veslo-P RDF	—	Direction finder	—	6.5