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From: Rich Gano (no email)
Date: Tue Nov 02 2004 - 13:24:12 EST
At what latitude is 1 minute of LONGITUDE:
(easy one) equal to 1 nautical mile
(hard one) equal to 1 STATUTE mile
REPLY:
No Bowditch necessary
1 nm = about 6076 feet, which equals 1 minute of longitude at equator
1 stm = 5280 feet
Width of minute of longitude at any latitude is a function of the cosine
of the latitude in question.
Cos(0) (equator) = 1
Therefore; cos(0) is to 6076 feet as cosine (?) is to 5280 feet.
Or cos (?) = 5280/6076 = .86899
And ? = 29.65 degrees N/S
QED
Rich Gano
CALYPSO (GB42-295)
Southport, FL
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