Meaning ofjackstaysin English

Noun

1. a rope or bar on a ship's yard for sail attachment
   The sailor secured the sail to the jackstays on the yard.
2. a line for clipping a safety harness to prevent falling
   The climber attached her harness to the jackstays to prevent a fall.
3. an underwater guide line for divers or loads; controlling searches
   The rescue team used jackstays to guide the divers through the wreckage.
4. a cable for load support between ships or to a fixed point
   The cargo ship was secured to the dock with a jackstay to prevent drifting.