Quote:
Originally Posted by Sjizzle
here we go example
If it is 18.00 GMT when it is 09.20 local time on the same day, then local time must be 8 hours and 40 minutes behind GMT. Therefore Long = – [(8 x 15o) + (40 ÷ 60 x 15o )] = – [120o + 10o] = -130o = 130o West
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The above is for Local Time behind GMT. Please give me an example of 01.00 GMT and 02.00 Local where Local Time is ahead of GMT. When I tried it I got the following...
If it is 01.00 GMT when it is 02.00 local time on the same day, then local time must be 1 hours and 0 minutes *ahead* GMT. Therefore Long = - [(23 x 15o) + (0 ÷ 60 x 15o )] = – [345o + 0o] = -345o = 345o West = 015o E.
Plotting the above with the latitude of 56o 32' N which is on land.
FWIW - The SH5 GMT minutes are always the same as Local (Naut) minutes. This always produces a whole degree and 0 minutes difference.