Robert William Hanmer Everett was a British jockey and a Royal Navy Volunteer Reserve pilot during the Second World War. In 1929, he won the Grand National on Gregalach. In 1941, as a Fleet Air Arm pilot, he achieved the first "kill" by a rocket-launched fighter, shooting down a long-range Focke-Wulf Fw 200 Condor over the Atlantic. For this hazardous success, he was awarded the Distinguished Service Order (DSO). Knowledge of Everett's life is fragmentary, with just a few notable events.

804 Naval Air Squadron was a Naval Air Squadron of the Royal Navy, formed in November 1939 from part of 769 NAS Sea Gladiators which had been detached to RNAS Hatston. The squadron was merged into 800 NAS in June 1944 and subsequently reformed in September.