(which is also referred to as HS-21) is a unit in the Japanese Maritime Self-Defence Force. It is a part of the Fleet Air Force and comes under the authority of Fleet Air Wing 21. Equipped with Mitsubishi SH-60J & SH-60K anti-submarine helicopters, it is based at Tateyama Air Base in Chiba Prefecture.Thompson, Paul JMSDF - Order of Battle February 1st, 2018 Retrieved May 21, 2018 Airborne Ocean Surveillance Retrieved February 9, 2017
Squadron structure The squadron is composed of two flights: 211th Flight is equipped with SH-60J and SH-60K helicopters 212th flight is equipped with only SH-60K helicopters
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