the rope at the lower corner of the mainsail for regulating its position.
(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
The line that controls the trim and shape of the mainsail.
the line used to trim, or manage the shape of the mainsail through tension on the boom of the boat
A rope by which the mainsail is trimmed and secured.
The line used to pull the mainsail in or let it out.
The sail control that allows the greatest effect on mainsail shape. This control can increase or decrease downward tension on the boom, affecting both sail shape and the angle of the sail to the wind.
the rope pulley system that controls the boom
the line that controls the boom
The rope which controls the movement of a mainsail.
Line that controls the position of the mainsail.
The line used to trim the back edge (leech) of the mainsail.
string (sheet) to control angle of mainsail to wind