A sailboat can certainly be operating under sail at night. Sailboats use their sails when there is enough wind to carry them.
The correct spelling is "sailboat" (boat propelled by sails).
By the types of sails that you have. or it could be the wind type or the wind's speed
A sailboat that has stopped moving due to no wind, or improperly oriented sails, is said to be "in irons"
The wind blowing past the sails creates a force that pulls the boat along.
boom or mast
Yeah!! What do you think they will do without them!
Sails to the Wind was created in 1994.
Wind powers a sailboat.
Sails eat wind,
It depends on many factors. The hull shape, how the sails are rigged, how much sail area you have, the ability of the crew, the wind speed, the tide.