Left on deck is a nautical term that refers to an item or person that has been left behind on the deck of a ship. The term can also be used to describe something that has been forgotten or overlooked. In a crossword puzzle, the solutions for the term Left on Deck would be PORT (4 letters) and APORT (5 letters). PORT is a noun meaning a place on the coast where ships can dock and unload cargo, while APORT is an adverb meaning towards the left side of a ship when facing forward.