Originally Posted By: CaT

I understand a nm and a knot are not the same thing and that a knot is a mesure of speed and not distance.

I wasn't really meaning to think that you didn't, but were using shorthand, which you were.
As a sailing instructor, I'm continually educationg people as to the meaning of the units, about which most people are confused. As a mathematician (statistics), I'm somewhat anal about keeping track of units in any discussion, to make sense of things.

It just jumped out at me as something that would be confusing, like stating that 1 mile = 60 minutes. Huh?