To be very exact if use a compass to set a True NORTH, we have to take in to account 3 meanings of the "north" 1. True North - the point what we rally need (Geographic North Pole) 2 Magnetic North - called declination (magnetic variation) and explained by James 3 Compass North - called deviation . compass deviation depends on the environment you make a measurement. e.g. the antenna mast, or can of beer near by can make an impact. The only having those three figures it's possible to calculate a True North. The other way is to take a local map, or use Google map, to point antenna location on it and find the right known point, check the heading on the map. Point the antenna to it and make the right settings on the unit.
Rgds. Vigis LY2CX ---------------------- As a former naval navigator, I have been following this discussion with interest. I agree with Jim that it makes most sense to use true north. The magnetic pole shifts each year, and the amount of shift is indicated on nautical charts as the "Variation". ______________________________________________________________ Dx4win mailing list Home: http://mailman.qth.net/mailman/listinfo/dx4win Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Dx4win@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
