It reformed the following year, in July 1942, tasked as a Fighter Direction Training Unit, at RNAS Charlton Horethorne (HMS Heron II).

[2] 790 Naval Air Squadron reformed on the 27 July 1942, at RNAS Charlton Horethorne (HMS Heron II), situated in the hamlet of Sigwells in Somerset, England, attached to the Fighter Direction School.

The squadron briefly operated from RAF Culmhead, situated at Churchstanton on the Blackdown Hills in Somerset, during August and September of that year, but later moved to RNAS Zeals (HMS Hummingbird), sited to the north of the village of Zeals in Wiltshire, on the 1 April 1945.

[4] The squadron continued to provide live interception flights but now for the new purpose built Air Direction School, which was located 1 mile South of RNAS Dale, at HMS Harrier, also known as R.N.

790 Naval Air Squadron moved to RNAS Culdrose (HMS Seahawk), situated near Helston, on the Lizard Peninsula of Cornwall, on the 13 December 1947,[4] it operated out of here for the next couple of years before disbanding on the 15 November 1949.