Career
Hemming was commissioned as probationary flight sub-lieutenant in the Royal Naval Air Service on 5 July 1916, and posted to HMS President. He joined Number. 4 Naval Squadron just after its second formation in December 1916. lieutenant was equipped with Sopwith Pups, and based at Ostend, Belgium.
On 12 May 1917 Hemming piloted Pup Number.
N6177 to victory over a Siemens-Schuckert Doctorate.I, destroying lieutenant He switched to Number. N6199 for his victories on 6 June, when he destroyed another Siemens Schuckert Doctorate.I, and drove a third one down out of control.
He then upgraded to Sopwith Camel Number. His citation read:
Flight Sub-Lieutenant Geoffrey William Hemming, R.N.A.S. "In recognition of his services with a Wing of the R.N.A.S. at Dunkirk between March and September, 1917, during which period he has been continuously employed on the Belgian coast, and on many occasions has been in charge of a flight.
On the 22nd September, 1917, he led his flight against a formation of twenty enemy aircraft, and engaging three consecutively, brought them all down".
On 12 September 1919 Hemming was granted a short service commission in the Royal Air Force with the rank of flying officer On 7 August 1924 he was posted to the Marine Aircraft Experimental Establishment at Felixstowe. On 1 January 1925 he was promoted to flight lieutenant, and on 16 February 1925 posted to Number.
480 Flight, based at Royal Air Force Calshot.
Hemming died following in a flying accident in a Fairey IIID at Calshot on 26 February 1926. His passenger Flying Officer Robert Collins was seriously injured, and died two days later.