NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Altitude correction using Artificial Horizon?
From: Andrés Ruiz
Date: 2000 Sep 08, 1:03 AM
From: Andrés Ruiz
Date: 2000 Sep 08, 1:03 AM
Hello Kirk,
When using an external artificial horizon with a marine sextant:
a.. The vertical angular distance between the body and its reflected
image, is twice the altitude: Hs = Hap_horiz/2
b.. Correction for dip does not apply: dip=0.
c.. Other errors caused by acceleration forces, (boat movements, coriolis,
...), acting on the liquid and doing their surface not to be perpendicular
to the gravitational force.
More information can be found at:
http://www.geocities.com/andresruizgonzalez/ [Navigation][Corrections for sextant altitude]
Andr�s Ruiz
e-mail: aruiz@orona.es
