True wind

The actual wind speed and direction relative to the ground — what a stationary observer at the boat's location would feel.

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Related T-terms

Topsides

The outer sides of the hull between the waterline and the deck.

Transom

The flat — or nearly flat — after face of the stern.

Topping lift

A line from the masthead (or a backstay bridle) supporting the aft end of the boom when th…

Tackle

An arrangement of blocks and line that provides mechanical advantage.

Tack

(1) To turn the bow through the eye of the wind so the boat changes from one close-hauled …

Tether

A two- or three-hook safety line attaching a crew member's lifejacket/harness to a jacklin…

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