NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: dip, dip short, distance off with buildings, etc.
From: Bill B
Date: 2006 Jan 10, 19:33 -0500
From: Bill B
Date: 2006 Jan 10, 19:33 -0500
Using a value for lift due to refraction between Franks 0.15' per nautical mile, and lift in feet = distance in nautical miles squared * .287, I solved for new values for the Bowditch Table 15 formula. Try replacing .0002419 with .0002001, and .7349 with .6079. I have done three trial runs with the new values, and they seem to approach reality with the average of mean refraction values derived from the two methods above, a least when height of eye is 0. I would be very interested in feedback. Thanks Bill
