velaria
roach
When a sail fills out because of wind blowing in it, the curved, concave part is called its 'belly'.
square because it has more surface area
It is a four sided sail. I think the answer you are looking for is square sail. A square sail is not necessarily a square, it can be rectangular. Before the era of steamships, most cargos were carried by sailing ships and mopst of them had square sails.
The vertical post is the mast, and the horizontal post is the spar. Both are required.
yardarm - an extension would be a sprit
It is called the lateen sail.
Um.........you just said the answer. its called a sail
Square sails are not truly square but rectangular with a longer long side on the bottom perimeter of the sail. They were and are referred to as "four-cornered" sails.
A sail boat or yacht.
Please answer.
The area of Sail-les-Bains is 21.11 square kilometers.