A pulley with one or more sheaves (grooves), over which a rope is roved. It can be used to chage the direction of the rope, or in pairs used to form a tackle.



Related Terms

LIFT

1) A change in wind direction enabling a yacht to point in a direction that was previously too close hauled. 2) A rope or tackle from a boom to the mast to support and move it for cargo working.

UNREEVE

To pull a rope from a sheave or block.

END FOR END

To reeve a rope in the opposite direction through a tackle in order to put an unworn section over the pulley.

PENDANT

  1. A length of wire or rope secured at one end to a mast or spar and having a block or other fitting at the lower end.
  2. A length of wire or rope hooked to a tackle on leeboards.
  3. A long, thin triangular flag flown from the masthead of a military ship (as opposed to a burgee, the flags thus flown on yachts).

SHEAVE

Pulley in the block

SNATCH BLOCK

A single sheave made so that the shell opens on one side of the base allowing a rope to be slipped over the sheave without threading it. Used to change direction of pull.

FALL BLOCK

A pulley block that rises and falls with the load on a lifting tackle.

CABLE-LAID

Rope (usually) left-handed of nine strands, in the form of three three-stranded, right-handed ropes.

HORSE

A raised track way on which the traveller carrying the lower block of the mainsheet tackle slides.

RADIO FIX

A navigational position determined by radio direction finder. radio frequency. Any electromagnetic wave occurring within that segment of the spectrum normally associated with some form of radio propagation.

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