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Hello Sam

Here are some direct formulae for you.

Lat1 and Long1 are your start latitude and longitude. 

Lat2 and Long2 are the new coordinates at the given bearing and distance

Diff will be the difference between Long1 and Long2

Dist will be the distance in nautical miles. A nautical mile is equivalent to one minute of arc on a Great Circle, so this is converted to degrees in the formulae by dividing by 60

Sin(Lat2) = Cos(Dist/60) Sin(Lat1) + Sin(Dist/60) Cos(Lat1) Cos(Bearing)

Sin(Diff) = Sin(Bearing) Sin(Dist/60) / Cos(Lat2)

Long2 = Long1 + Diff

Caveat

I do not have my scientific calculator with me, so I cannot test these formulae. As General Norman Schwarzkopf once wisely remarked, "If it has not been tested, it does not work."

Geoff

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ey Kolbe