Wing Commander Frank Arthur Brock OBE (29 June 1884 – 23 April 1918) was a British officer commissioned into the Royal Artillery, the Royal Naval Volunteer Reserve, the Royal Naval Air Service (RNAS) and finally, when the RNAS merged with the RFC, the Royal Air Force. He invented the explosive bullet that destroyed the German Zeppelins and he devised and executed the smoke screen used during the Zeebrugge Raid on 23 April 1918, in the British Royal Navy's attempt to neutralize the key Belgian port of Bruges-Zeebrugge during the First World War.