Fair: Said of a wind which a vessel has when she can lay her course a point or any number of points free.
Fetch: To arrive at a point when sailing to windward by weathering it.
Fly up in the wind: Said of a vessel when she comes up suddenly head to wind, by reason of her griping or through the bad steering of the helmsman.
Foot: The lower part of a sail or mast.
Fore-and-aft sails: Sails that are set on gaffs and stays, and not on yards.
Fore-reach: When close-hauled to sail ahead of another vessel. To fore-reach to windward is to sail ahead of a vessel and yet to windward of her at the same time.
Free-wind: When a vessel has the wind so as not to be close-hauled. When the wind comes abeam or on the quarter, a vessel is said to be going large. A fair wind may mean free, large, or any wind that blows between 1-2 points of the compass from the point on which the vessel would be close-hauled.
Gaskets: Ropes used to secure sails to their yards or booms when furled or stowed.
Goose-winged: Said of a schooner whose mainsail and foresail are extended on opposite sides as she runs before the wind.