The term CAPT.'S HEADING refers to the directions a captain would use when navigating a ship. The crossword solutions for this term are NNW (3 letters), ESE (3 letters), NNE (3 letters), SSE (3 letters), and SSW (3 letters). These abbreviations stand for North-Northwest, East-Southeast, North-Northeast, South-Southeast, and South-Southwest respectively. These directions are used to indicate the direction of travel or the orientation of a vessel relative to the cardinal points of a compass.