The term 'CAPT's Subordinate' refers to a range of military personnel who are subordinate to a Captain, the highest rank in the Navy. The four crossword solutions for this term are Ensign (ENS), Commander (CDR), Commander (CMDR), and Lieutenant (LIEUT). An Ensign is the lowest rank in the Navy and is typically a newly commissioned officer. A Commander is a senior officer who is responsible for a division or department within a ship or shore establishment. A Commander is also the commanding officer of a smaller vessel. A Lieutenant is a junior officer who is responsible for a division or department within a ship or shore establishment.