I celebrated arriving into 2017 by taking an hourly set of Sun Sights through the course of the day - and losing out out with a Moon and Venus Sight. All this to get cracking on using a new 2017 Nautical Alamanc. I have previously referred to my back yard approach to Celestial Navigation as Guerilla CelNav, because of dealing with clouds, trees, overhead wires, squirrel nests and other manner of things that get in the way of a clear limb or body to get a sight on. I have tried to imagine getting a photo that would show some of the interesting viewing challenges that occur which lead to a lot of guessing of where the bottom or top of the limb might be because it is hidden behind something.
Here is a photo of what a good part of my 'clear' sky looks like...
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| View of the Sky from the Stone Frigate |
Anyway, during yesterday's sights I wasn't expecting to get a good round of results because of visual obstruction through the trees for some Sun Sights, and particularly the Moon. For the Moon I was shooting through tree branches and waiting for a gap so that I could see the LL.
Amazingly, I got 8 sights on the day that had LOP's that were either spot on or within 1.5 nm of actual - just lucky I guess.
And the plots...
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| 1 January 2017 Plots |
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