NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2013 May 3, 15:28 -0700
Bill,
Running down a line of position goes back a thousand years when Indian Ocean navigators observed Polaris using the Kamal. The Kamal provided a way to latitude sail without charts or calculations.
http://en.wikipedia.org/wiki/Kamal_(navigation)
Greg Rudzinski
Sun lines was Moonrise video
From: Bill B
Date: 2013 May 3, 13:04 -0700
Greg and Gary
Thanks for the information on "running down a sun line." Greg's "Landfall" article gave me a frame of reference, similar to days of old making landfall where latitude was known and longitude was a best guess based on DR.
I've read through the initial reference from Greg to Gary's work, and believe I understand the concept although I have no working knowledge of HO 208. I'll make the naive assumption other tabular methods may work as well (229 or 249).
Being a visual learner, my next step is to use a universal mercator chart and follow through the example, which should help clarify the process in my mind (if an old dog can learn new tricks). Perhaps after that exercise I can follow up with any quasi-informed questions I may have.
BTW It was interesting viewing a 1940's document that was "declassified".
GCT (Greenwich Civil Time) vs GMT vs UT. I wish they would make up their minds :-)
Bill B
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