At http://en.wikipedia.org/wiki/Angle#Conventions_on_measurement, the mathematical convention is listed first, and is said to be "universally adopted in mathematical writing". The navigational convention is mentioned second.
I just expanded that paragraph, can someone who knows their arc from their elbow please check that I haven't made any mistakes.
__________________________________________________ Phil Hibbs | Capgemini | Rotherham Technical Consultant __________________________________________________
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