![An original cleat from HMY Britannia - K1 Britannia (2)](https://upload.wikimedia.org/wikipedia/commons/5/59/An_original_cleat_from_HMY_Britannia_-_K1_Britannia_%282%29.jpg)
In nautical contexts, a cleat is a device for securing a
rope
A rope is a group of yarns, plies, fibres, or strands that are twisted or braided together into a larger and stronger form. Ropes have tensile strength and so can be used for dragging and lifting. Rope is thicker and stronger than similar ...
.
Types
Types of cleat designs include the following:
* A horn cleat is the traditional design, featuring two “horns” extending parallel to the deck or the axis of the
spar
SPAR, originally DESPAR, styled as DE SPAR, is a Dutch multinational that provides branding, supplies and support services for independently owned and operated food retail stores. It was founded in the Netherlands in 1932, by Adriaan van Well, ...
, attached to a flat surface or a spar, and resembling an
anvil.
* A cam cleat in which one or two spring-loaded
cam
Calmodulin (CaM) (an abbreviation for calcium-modulated protein) is a multifunctional intermediate calcium-binding messenger protein expressed in all eukaryotic cells. It is an intracellular target of the secondary messenger Ca2+, and the bin ...
s pinch the rope, allowing the rope to be adjusted easily, and quickly released when under load.
* A jam cleat in which the line is pinched in a v-shaped slot.
* A clam cleat (or jam cleat) in which the rope is held between two fluted stationary pieces. Such a cleat vaguely resembles two halves of a clam shell held back to back. It is more compact than a cam cleat, but the rope is less easily released under load.
A cleat hitch is a knot used to secure a rope to a cleat.
Tied cleat.jpg, A line tied with a cleat hitch to a horn cleat[Ashley 1993, p. 286.] on a dock. The line comes from a boat off the top of the picture, around the right horn, around the left horn, across the cleat from top left to bottom right, around the right horn, and then hitches around the left horn. Note that this line is tied improperly; the line from the boat should initially run to the far (left) side of the horn cleat rather than close (right) side.
Jamming cleat.jpg, A jam cleat. The rope is free to run around the lower part of the cleat (below the screws). The upper part is tapered so that the space between the cleat and the boat gets smaller closer to the screws, causing the rope to jam in the cleat when it is pulled downward.
File:US Navy 060206-N-1464F-001 The Los Angeles-class fast attack submarine USS Dallas (SSN 700) sits pierside with the Dry Deck Shelter (DDS)-equipped submarine attached to its aft escape trunk.jpg, A large mooring cleat
File:Curry2.jpg, Cam cleat: the rope passes between two cams, which resist a pull in a direction away from the camera.
References
Bibliography
* Ashley, Clifford W. (1993)
944
Year 944 (Roman numerals, CMXLIV) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar.
Events
By place
Byzantine Empire
* Arab–Byzantine wars, Arab–Byzantine War: Byzantine forces are de ...
The Ashley Book of Knots, New York: Doubleday, p. Dust jacket,
External links
*
* http://www.bcx.news/photos/things/water/nautical/cleats/
{{Sail Types
Watercraft components