a force in the air pushing a sail to move a boat also know as wind
No a boat or sail license is not required if human or sail powered.
Wind!
Lock exist because you need leveled water to be able to sail or barge from place to place.
They have a sail to hellp it move also the wind pushes on the sail to make it move around.
Speaking as a current student attending Full Sail University, you need two letters of recommendation.
China doesn't need to sail to Southeast Asia. It's already there.
No.
None.
It depends on the vessel and how it is rigged
you have to get on a ship and sail to japan then eat some noodles then DANCE ! then sail to france and get eaten by a shark on the way
No, but if you intend to race or compete in competitions then you do need a number.
If you are sailing within the US, no.