The
Project 877V Alrosa is the only Kilo-class submarine fitted
with a pump-jet system instead of the standard propeller. A pump-jet
allows for higher speed before the onset of cavitation and lower acoustic
signature.
The Alrosa was laid down in 1988 and commissioned into service in 1990.
For a while, it had been the only operational submarine of the Black
Sea Fleet. The Alrosa has an underwater displacement of 3,950 tons,
a length of 76.2 m, a submerged speed of 17 knots and an endurance of
45 days. The submarine carries six 533-mm torpedo tubes and a crew of
52.
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