Competent Crew Quiz · Sails and ropes 
A sailing yacht seen from the side, bow to the right. Shown in red: the rope from the outer end of the boom down to the cockpit.
The rope shown in red controls how far the boom swings out. What is it called?
Show the answer
Mainsheet. The mainsheet runs from the boom to the cockpit. Ease it to let the sail out, pull it in to bring the sail in.