"Thom Stewart" wrote:
......wouldld include leeway, tide, deviation and variation, windage,
helmsmans error, etc.

That's pretty close, but you are missing one thing:
Unless you crossed the equator exactly after the first 7 hours which
is statistically very unlikely there vould also be a geometrical
component due to the fact that you are sailing on a globe
and not on a pancake.

Velocity over the ground (?) ("beholden fart" in my native language)
in a unit of nautical miles
per 56 hours, would be the closest I can think of, but it doeen't make
much sense.


Peter S/Y Anicula