upperworks [2]
Small equipment and accessories on a boat’s deck especially for rigging, adjusting and handling the sails.
sheet lead 
Ringed part through which a sheet passes to change its direction; it must be perfectly smooth to prevent wear on the rope.
clam cleat 
Device made up of two jaws with springs for locking a rope; after the rope is pulled, it stays in place.
traveler 
Metal bar running across the deck; a car travels back and forth on it to move the mainsheet.
clam cleat 
Device made up of two jaws with springs for locking a rope; after the rope is pulled, it stays in place.
car 
Moving device that is connected to the mainsheet; the movement of the car quickly changes the sail position in relation to the wind.