Beloe joined the Royal Navy in 1923. He served in World War II commanding the destroyer HMS "Campbeltown" and frigate HMS "Cotton" in the Western Approaches, Western Mediterranean and Russian convoys. After the War he commanded the destroyer HMS "Contest" and then became Deputy Director of the Royal Navy Staff College before commanding the destroyer HMS "Dainty" and then the aircraft carrier HMS "Ocean". He was appointed Commodore commanding the Pakistan Flotilla in 1957, Commodore in charge of the Royal Navy Barracks, Devonport in 1959 and Flag Officer, Medway and Admiral Superintendent, Chatham in 1961. His last appointment was as Deputy Supreme Allied Commander Atlantic in 1964 before his sudden death from a heart attack as he left his home in 1966.