| Early | Modernized
|
| Chief designer of the project | Ya.E. Evgrafov | Malakhit Design Bureau
|
| Building plant | Leningrad Admiralty Association |
|
| Delivery of an experimental ship | 1974 | None
|
| Number of ships built | thirteen | none
|
| Displacement (normal) | 15.7 t | 4.4 m 3
|
| Length | 9.5 m | about 9 m
|
| Width | 1.9 m | 1.6 m
|
| Body height | .. | 1.6 m
|
| Buoyancy (as a percentage of normal displacement) | .. | about 8
|
| Immersion depth limit | 40 m | 40 m
|
| Autonomy | .. | about 12 hours
|
| Maximum underwater speed | .. | 6 knots
|
| Group of frogmen | 2 h + 4 combat swimmers | 6 people
|
| Navigation range (maximum underwater speed), | 60 miles | 60 miles
|
| Body material | .. | aluminum-magnesium alloy
|
