To Fill.—To have the wind strike the inner or after surfaces of the sails.
Flake.—One circle of a coil of rope.
Flukes.—The broad spade-like parts of an anchor.
Fore.—That part of the yacht nearest to the head.
Fore and Aft.—In the direction of the keel; also vessels without square yards. Hence a schooner is often called a "fore-and-after;" and a ship, a "square-rigger."
Foul Hawse.—When the cables are twisted.
To Foul.—To entangle a rope; as, "The jib-halliards are foul." To run foul of a yacht is to come in collision with another.
To Founder.—To sink.
Furling.—Making the sails fast to the booms and spars, and stowing them, by means of gaskets.
Gaff.—The spar that supports the head of a fore-and-aft sail.