NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Marty Lyons
Date: 2015 Jun 21, 06:52 -0700
I was doing some sextant practice on land under the following circumstances. Shooting the sun from top of a multi-story parking deck, 76 feet above the adjacent ground. That ground elevation was 163 feet above sea level. The horizon I was using was a low mountain range (to see over local obstacles) about 13 nautical miles away with an elevation of 500 feet above sea level.
I planned on using the dip short formula Ds= 0.3611(naut. miles)+0.6511(naut miles /h in feet)
Do I need to take into account the elevations of the DR ground and the horizon ground?
Do I need to account for the difference in those elevations?
Is it even possible to expect reasonable results with this scenario?
Without considering dip short, and just using a height of eye of 76 feet, I got an intercept of 14.4 Nm away.
