The Kamov Ka-25 is a Russian naval helicopter. Designed by Nikolai Il'yich Kamov or V.A.Glushenkov. First flew in 1961. Was produced by the Kamov company. Featured the characteristic co-axial rotor design of Russian military helicopters. Used either in anti-submarine warfare roles, with radar, dipping sonar and a towed MAD ('A' variant) or in a OTH missile guidance role with just a radar ('B' variant). Armed with torpedoes or nuclear depth-charges.

NATO reporting name: Hormone