The Ka-52K "Katran" (Russian: Катран, 'mud shark'), a navalised derivative of the Ka-52, has been selected as the new ship-borne attack type for the Russian Naval Aviation (Aviatsiya Voenno-morskogo Flota Rossii). Its features include folding rotor blades, folding wings and life-support systems for the crew members, who will fly in immersion suits. The fuselage and systems receive special anti-corrosion treatment and a new fire-control radar will be capable of operating in "Sea Mode" and of supporting anti-ship missiles. Russian Naval Aviation will need at least 40 Ka-52Ks, the first of which was tentatively slated to enter squadron service by early 2015, coinciding with the delivery of the first carrier. The first of four Ka-52Ks ordered for the Russian Navy flew on the 7 March 2015; the Navy also has option on a further 28 helicopters.[52] In total, 4 pre-series Ka-52K are currently operated and used for testing by the Russian Navy.