R-360 Neptune (Ukrainian: Р-360 «Нептун», romanized: R-360 "Neptun") is a Ukrainian anti-ship cruise missile developed by the Luch Design Bureau.
Neptune's design is based on the Soviet Kh-35 anti-ship missile, with substantially improved range and electronics.[2] The system requirement was for a single missile to defeat surface warships and transport vessels with a displacement of up to 5,000 tons, either in convoys or moving individually.
The system entered service with the Ukrainian Navy in March 2021