Tack (redirected from tackless)

tack¹

1. a short sharp-pointed nail, usually with a flat and comparatively large head

2. Nautical the heading of a vessel sailing to windward, stated in terms of the side of the sail against which the wind is pressing

3. Nautical

a. a course sailed by a sailing vessel with the wind blowing from forward of the beam

b. one such course or a zigzag pattern of such courses

4. Nautical

a. a sheet for controlling the weather clew of a course

b. the weather clew itself

5. Nautical the forward lower clew of a fore-and-aft sail

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tack²

a. riding harness for horses, such as saddles, bridles, etc.

b. (as modifier): the tack room

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tack [tak]

(design engineering)

A small, sharp-pointed nail with a broad flat head.

(materials)

Adhesive stickiness, such as occurs on the surface of a varnish or ink that has not completely dried. Also known as tackiness.

(navigation)

To change the course of a sailing vessel by coming about so as to take the wind from over the opposite bow (starboard or port).

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tack

1. A strip of metal, usually lead or copper, used as a clip to secure the edges of metal items in roof construction, such as flashings.

2. A short, sharp-pointed nail.

3. The property of an adhesive that enables it to form a bond of measurable strength immediately after the adhesive and adherend are brought into contact under low pressure.

4. To glue, weld, or otherwise fasten in spots rather than in a continuous line.

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Tack 

(Russian, gals; from Dutch hals). (1) The course of a vessel with respect to the wind (for example, a vessel is moving on a starboard tack when the wind is blowing toward the starboard side of a vessel).

(2) The segment of a vessel’s course from turn to turn while maneuvering under sail, carrying out measuring operations, sweeping mines, fishing, and so on.

(3) A rope securing the lower windward corner of the sail (the tack corner) to a mast.