NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sun shots
From: Joshua Carty
Date: 2026 May 19, 08:00 -0700
From: Joshua Carty
Date: 2026 May 19, 08:00 -0700
Are you really looking for something SPECIFICALLY that you can run on an HP calculator? Or are you looking for any easy tool to assess your sextant sights? If it's **ONLY THAT** (an easy tool), you should try out Frank Reed's "GPS Anti-spoof" app which will work on any modern smartphone. You have a smartphone? Of course you do.
That app is described here: https://www.reednavigation.com/GPSantiSpoof/. It's great. Easy. Accurate. I use it all the time for practice sights. These links will take you straight to the app stores to download it so long as you visit my message, *this message* that you are reading, on your smartphone:
GPS Anti Spoof (standard) for iPhone/iPad and Android.
J.
