sentences:  He joined the battleship in the Mediterranean Fleet in December 1930 and became First Lieutenant in the submarine on the China Station in September 1933.Having attended the Submarine Command Course in Summer 1935, he was given command of the submarine in August 1935.Promoted to lieutenant commander on 16 October 1936, he attended the Royal Naval Staff College in Spring 1937 and then became Staff Officer (Operations) for the 4th Submarine Flotilla on the China Station in January 1938.