sentences:  He joined the Royal Navy as a cadet in 1919 and, having been promoted to midshipman on 15 January 1924, he went to sea in the battleship .Promoted to sub-lieutenant on 30 January 1927, Luce trained as a submarine specialist in 1927 and was posted to the submarine in April 1928.Promoted to lieutenant on 16 October 1928, he transferred to the submarine HMS "H49" in October 1929.