Mean-Genie has identified Frederick's Royal Navy record which covers his RNAS service from March 1917 to March 1918 during which he served in England. The 31 March 1918 is significant in that the next day, 1 April 1918, was the day the Royal Air Force was founded, taking men from the army Royal Flying Corps and also from the RNAS. His RAF record covers 1 Apr 1918 to 14 Nov 1919 when he was discharged. The National Archives reference for the RAF record is AIR 79/2038. The RNAS record is on Ancestry also and the RAF one on FindMyPast.
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