NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
LOP by Sextant Box Shadow
From: Greg Rudzinski
Date: 2008 Jul 18, 17:34 -0700
From: Greg Rudzinski
Date: 2008 Jul 18, 17:34 -0700
My sextant box was sitting before me on the dock casting a
shadow. Could this shadow provide me with a LOP?
The answer is yes. The inverse tangent of the sextant box height
divided by the length of the cast shadow generates an hs. I wasn't
sure wether to treat this hs as an upper or lower limb so I just did
the reduction as an upper limb to see what would happen.
Latitude 34 09.8'N Longitude 119 14.0'W Height of eye at zero
inverse tangent of (311.4mm/148.5mm) = 64 deg. 30.3' (hs) at
GMT(UTC,UT1) 21H 47M 28S on 07/11/2008
Azimuth 248.9 true Intercept 17.4' toward
A very lucky LOP I think!
--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
