They don't 'sail'. They might move due to some other force acting on them however. This could include currents, tides etc.
By auxiliary engine
ALMOST as fast as the wind!
because there is no wind
Wind mills, sail boats, kites, birds.
Wind energy is used to sail boats, and turn wind mills to make flour.
Water like the sea or lakes, but the sails sail on the wind and air. Hope this is the answer you were looking for!
Wind. You can also attach a machine that spins in the wind, generating electrical power.
Wind power propels sail boats, and powers wind turbines. It is not as widely used as coal, natural gas or oil.
-to pump water -grind grain -sail boats at sea
boats are awesome
They pretty much don't. If a sail-only ship is becalmed, or caught without wind, she is at the mercy of the currents until the wind picks up again.
some sail boats have moters onley big sail boats have moters not small ones