 Complete the following phrase:  Admiral of the Fleet Sir Rhoderick Robert McGrigor GCB 12 April 1893  3 December 1959 was a senior Royal Navy officer. He fought in the First World War and saw action during the Gallipoli Campaign and then the Battle of Jutland. 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 