899 Naval Air Squadron (899 NAS) was a squadron of the Fleet Air Arm of the United Kingdom. It was most recently based at RNAS Yeovilton (HMS Heron) as the British Aerospace Sea Harrier FA2 training squadron until it was decommissioned in March 2005 prior to the stand-up of 800 Naval Air Squadron with the Harrier GR7 at RAF Cottesmore.