Preventer

·noun An auxiliary rope to strengthen a mast.

II. Preventer ·noun One who goes before; one who forestalls or anticipates another.

III. Preventer ·noun One who prevents or obstructs; a hinderer; that which hinders; as, a preventer of evils or of disease.

preventer
Applied to ropes, &c., when used as additional securities to aid other ropes in supporting spars, &c...

The Sailor's Word-Book
preventer-plates
Stout plates of iron for securing the chains to the ship's side; one end is on the chain-plate bolt,...

The Sailor's Word-Book
preventer-stoppers
Short pieces of rope, knotted at each end, for securing the clues of sails or rigging during action,...

The Sailor's Word-Book
shifting backstays, also preventer
Those which can be changed from one side of a ship to the other, as the occasion demands. ...

The Sailor's Word-Book