NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Alan S
Date: 2011 Feb 9, 10:06 -0800
Re that this device is or might be, an acquaintance offered the following:
1. I have shown the image to my grandfather and he feels that it is likely a solar line of sight compass.
2. The thought also occurs that it may be a device for calculating rate or estimating speed/time of a course or leg.
3. Well from a cursory examination of the illustration i would tend to think that it might be a device for converting scale ratios on maps, or perhaps to convert scalar distances to NM or Km etc...
I have no idea myself, so I suppose that one might "take their pick".
Alan
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