SailNet Community - View Single Post - Question for the Cel Nav Pros
View Single Post
post #4 of Old 11-05-2019 Thread Starter
Senior Member
Join Date: Jul 2017
Posts: 115
Thanks: 10
Thanked 6 Times in 6 Posts
Rep Power: 3
Re: Question for the Cel Nav Pros

Well, I did a test shot and reduction. Since Im sort of on my own I use a pretty nice excel sight reduction calculator to check my work (free at Interactive Spreadsheets for Celestial Navigation ).

What it told me was I need to use height above sea level. I was about 3.1 miles off of actual GPS position using height above sea level dip correction, and about 17 nm off using height above ground. Ive just done it once tho. It could be that I was horribly off and just dumb luck that made the results work that way.

Last edited by CrispyCringle; 11-05-2019 at 09:42 AM.
CrispyCringle is online now  
For the best viewing experience please update your browser to Google Chrome