what is the difference between a boat and a ship and a ship and a sea going vessel ?

[ansamet:t]

what is the difference between a ship and a vessel and why is a vessel called a vessel and a ship is called a ship ?

10 points up 4 grabs xD

 

[vavavoom]

Boat - underwater
Ship - on the water

 

[COLINT]

A boat is relatively small, a ship is large and a sea going vessel is just that, any craft designed for use at sea (some fishing vessels are boats as such but are also sea going vessels). There are guideline sizes for boat-ship but i cannot remember them.

Incidentally, submarines are also commonly called 'boats'.