| Term | Definition |
| FIELD DAY | A day devoted to general cleaning, usually in preparation for inspection. |
| FIRST LIEUTENANT | The officer responsible, in general, for a ship's upkeep and cleanliness. |
| FLAG OFFICER | Any officer of the rank of RADM (0-7) and above. |
| FOUL | Entangled, as in "the lines are foul of each other; stormy. |
| GANGWAY | An order meaning to clear the way. An opening in the bulwark for accommodation access |
| GENERAL QUARTERS | The condition of full readiness for battle |
| HEADING | The direction toward which the ship's bow is pointing at any instant. |
| HEAVE | To throw. |
| HELMSMAN | Person who steers the ship by turning her helm. |
| ISLAND | The superstructure of an aircraft carrier. |