Quote:
Originally Posted by The Mekon
Matt, I love you for this. So many times I have seen on this forum posts about magnetic variation (mariners never use the term "declination") and calculating this to find true south.
Your method is the correct way to plot a true N/S line. Problem is that most people do not know how to find the exact time of the sun's meridian passage. Perhaps Allan was shown this early in his navigation training, but other matters soon overtook it in importance. Maybe one day I will do a post of how to find this time - it may be easily available for any location on the net these days - I would not know.
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John, I cheated and went to an online calculator.... in my defence I lost my Nautical Almanac three decades ago, can't remember the Arc to Time conversions and no longer own a sextant......
lucky for me though, I live in Canberra where the Solar Noon and Local Time are almost coincident, for example, tomorrow the Solar Noon here is at 1200hrs..