Second World War Admiral of the Fleet Sir Rhoderick Robert McGrigor, GCB (12 April 1893 – 3 December 1959) was a senior Royal Navy officer.

He also served in the Second World War, taking part in the sinking of the Bismarck in May 1941, carrying out the office of Assistant Chief of the Naval Staff (Weapons) and commanding the 1st Cruiser Squadron during operations off the Norwegian coast and convoys to North Russia.

[2] Promoted to midshipman on 15 September 1910, McGrigor was posted to the battleship HMS Formidable in the Atlantic Fleet in April 1911.

[3] In early 1941, McGrigor was, briefly, Flag Captain, HMS Renown, flagship of Sir James Somerville[3] and was involved in the Malta Convoys and other operations in the Atlantic and Mediterranean including the Bombardment of Genoa in February 1941 and the sinking of the Bismarck in May 1941.

[11] He was mentioned in despatches for Operation Counterblast (the destruction of enemy shipping off the south-west coast of Norway in November 1944).

[1] On 7 June 1945 with the 1st Cruiser Squadron he conveyed King Haakon to Oslo on his return to Norway after five years in Britain, for which he was awarded the honour of Commander of the Norwegian Order of St.

He became Vice Chief of the Naval Staff in October 1945 and, having been promoted to full admiral on 2 September 1948,[14] he became Commander-in-Chief, Home Fleet in January 1949.