(JJ Sinclair) wrote in message ...
Navigational question for the day;
One minute of latitude = 1 nautical mile. At what point on the earth does 1
minute of longatude = 1 nautical mile?
JJ Sinclair

(Didn't read the question the first time, and answered "When does a
minute of lat = a minute of long?" instead.)

Second guess:

One minute of latitude equals 1.000000000 nm only at a single latitude
somewhere between 44° and 45° N (or S) latitude. (Don't expect it to
fall on an even minute.)
One minute of longitude equals 1.000000000 nm only at a single
latitude somewhere between 3° and 4° (N or S) latitude. (Don't expect
it to fall on an even minute.)

Morals:
1) Don't count on those ticks on the chart - you'll fall short : )
2) Don't move to the equator to find square lat/long grids.

Jonathan Gere