[Chaotic42]

Originally Posted by Sailor Steve

Here's something most folks don't think about: There are metric tons (tonnes) and standard tons (2000 pounds), but ships' displacements are measured in long tons (2240 pounds). This is why some early British systems (such as guns) are also measured in hundredweights. One hundredweight is 112 pounds, or 1/20th of a long ton.

Thanks a lot, England! :p