Kamenny Ruchey (also Mongokhto, Alekseyevka, and Mongohto) (Russian: Монгохто, Каменный Ручей) (ICAO: UHKG) is an air base in Russia located 29 km north of Sovetskaya Gavan. Located just north of Vanino, this is a major military naval airfield that has 63 hardened areas. The airfield is designated by CAICA as Kamenny Ruchey, but Russian topographic maps indicate the nearby settlement northeast of the airfield is Mongokhto, which is also synonymous with the military base. The airfield was a joint Soviet Navy base with the 143 MRAD (143rd Naval Aviation Division), flying Tupolev Tu-16, Tupolev Tu-22M, and the 310 OPLAP (310th Independent Long Range Anti-Submarine Aviation Regiment) flying Tupolev Tu-142 aircraft.