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For the name of a person, see David.

A davit, (dā'vət, dă'vət), is a structure, usually made of steel, which is used to lower things over an edge of a long drop off such as lowering a maintenance trapeze down a building or launching a lifeboat over the side of a ship.

The development of the davit from its original "goose neck form" to the current devices advanced greatly when A.P. Schat patented a number of systems in 1926 that allowed the lifeboat to glide over obstructions on a ships hull known as the "Schat Skate". This was followed by a self-braking winch system that allowed the lifeboat to be lowered evenly and then the modern davit was invented.

Davits have always been designed to fit into deck spaces that the naval architects deemed necessary and a variety of designs emerged:

  • GRA - Gravity Roller track davit (Miranda) - usually above promenade decks.
  • SPG - Single pivot gravity davit (Radial) - for many different deck spaces.
  • FFD - Free Fall davit - For Free Fall Lifeboats on stern
  • QD - Quadrantal Davit - Old mechanical style, often hand cranked into outboard position

The standard became so common that shipyard specifications call for Schat type davits from whatever source.

Davits can also refer to single mechanical arms with a winch for lowering life rafts and raising spare parts onto a vessel.

Recent developments are based on aft-launched ramps where the lifeboat is allowed to free fall, as opposed to being lowered by a winch, into the ocean. Thus Free Fall Lifeboat. Similar systems developed by Schat companies are used on offshore oil/gas rigs placed around the structure.


Wiktionary

Up to date as of January 15, 2010
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Definition from Wiktionary, a free dictionary

Contents

English

Wikipedia-logo.png Davit on Wikipedia.Wikipedia

Smaller davits fitted with blocks and tackles from which a dinghy is slung.

Pronunciation

Noun

Singular
davit

Plural
davits

davit (plural davits)

  1. (nautical) A spar formerly used on board of ships, as a crane to hoist the flukes of the anchor to the top of the bow, without injuring the sides of the ship.
  2. (nautical, construction) a crane, often working in pairs and usually made of steel, used to lower things over an edge of a long drop off, such as lowering a maintenance trapeze down a building or launching a lifeboat over the side of a ship.

Synonyms

  • (spar used to hoist the flukes of the anchor): fish davit

Translations


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