The term 'Ship Commander' is a job title that refers to the person in charge of a ship. This person is commonly referred to as the CAPTAIN, which is a 7 letter word that can be used to solve a crossword puzzle. The Ship Commander is responsible for the navigation and safety of the vessel, as well as the crew and passengers on board. They are also responsible for the maintenance and operation of the ship, and must ensure that all regulations and laws are followed.