sail [R47]: An extent of fabric used in propelling a model yacht.

Sails on a Sloop
jib (foresail, headsail) [R23]: A triangular sail set ahead of the mast and main sail.
mainsail (main) [R35]: The largest sail on a sailboat, crucial for propulsion, is attached to the mast and controlled by the main sheet.
The Edges of Sails
foot [R16]: The bottom edge of a sail.
leech [R31]: The trailing edge of a sail.
luff [R34]: The lead edge of a sail.
The Corners of Sails
clew [R08]: The after corner of a sail.
head [R20]: The top corner of a sail.
tack [R59]: The forward lower corner of a sail.



