The Staff, IJN; 1 Captain, 1 Commander, 6 Lt Comdrs, 5 Lieuts, 5 Sub Lts, 12 W.O.

Despite Admiralty reservations, a Civil Aviation Mission was sent to Japan in September 1921. The Master of Sempill led the mission of 30 instructors and further support staff.

Although the Sempill Mission was supposed to be a civil enterprise, its members were given Naval ranks and uniforms, according to their seniority within the party.