Vice Admiral Sir Alan Wedel Ramsay McNicoll, (3 April 1908 – 11 October 1987) was a senior officer in the Royal Australian Navy (RAN) and a diplomat. Born in Melbourne, he entered the Royal Australian Naval College at the age of thirteen and graduated in 1926. Following training and staff appointments in Australia and the United Kingdom, he was attached to the Royal Navy at the outbreak of the Second World War. As torpedo officer of the 1st Submarine Flotilla in the Mediterranean theatre, McNicoll was decorated with the George Medal in 1941 for disarming enemy ordnance. He served aboard from 1942, sailing in support of several Arctic convoys and taking part in the Allied invasion of Sicily. McNicoll was posted for staff duties with the Admiralty from September 1943 and was involved in the planning of the Normandy landings. He returned to Australia in October 1944.