 He specialised in anti-submarine warfare and saw service in the Atlantic, Arctic and Mediterranean during World War II.He became staff officer for convoys at Rosyth in 1940 and then commanded the destroyer HMS "Beverley" from 1941 before being posted to the anti-submarine warfare training school, HMS "Osprey", in a training role from 1942.He briefly commanded the yacht HMS "Philante" in 1943 and then became Assistant Staff Officer for Operations at Headquarters Western Approaches later that year.