Pyotr Lebedev (research vessel)

Pyotr Lebedev is a research vessel, built at Wärtsilä Crichton-Vulcan in Turku, Finland, originally as a merchant vessel Chapayev in 1957. She was subsequently acquired for the Soviet Union and refitted as a research ship.^[2] The vessel was owned and operated by the Andreev Acoustics Institute, and was used to make hydrophysical observations of the Atlantic Ocean such as during the Polygon experiment.^[3] Pyotr Lebedev possessed five on-board laboratories used to study hydroacoustics, hydrology, hydrobiology, hydrochemistry, and electronics.^[3] The ship was active as a research vessel from 1967 until 1977.^[4] She is current registered in Saint Vincent and the Grenadines.^[1]

History
Name	Chapayev[1]
Builder	Wärtsilä Crichton-Vulcan, Turku, Finland[1]
Yard number	1002
Laid down	16 April 1956
Acquired	3 April 1957
Soviet Union
Name	Pyotr Lebedev
Namesake	Pyotr Lebedev
In service	1966
Out of service	1977
Saint Vincent and the Grenadines
Name	Pyotr Lebedev[1]
Identification	IMO number: 5276159[1]
Status	in active service
General characteristics
Type	Research vessel/survey vessel
Tonnage	3,642 GT[1] 1,675 DWT[1]