Back in the Navy is a phrase used to describe someone who has returned to active duty in the United States Navy. The term can also refer to a person who has been discharged from the Navy and then re-enlisted. The crossword solutions for this term are STERN (5 letters), ASTERN (6 letters), and Aft (5 letters). STERN refers to the back of a ship, ASTERN means behind or in the rear of a vessel, and Aft is another word for the back of a boat. Together, these three words describe the position of someone who is back in the Navy.