• Buy it now
• Download the free, fully-functional demo today!
• Look at the online tutorial and instructions
• Join the CelestNav^TM Users Email List
• Frequently asked questions about CelestNav
• Read these customer comments

CelestNav^TM turns your PalmOS handheld into a full-featured calculator for celestial navigation.

CelestNav^TM requires 204k of free memory, and runs on all PalmOS compatible systems version 3.0 and above, including Handspring Visors, Sony Clies, and Handera and TRG units. The free math library Mathlib, written by Rick Huebner, is required; a copy is included for your convenience.

Try it:

Download a free, fully functional, 10-day demo of CelestNav^TM. Current version is 2.5, released October 12, 2002.

If you are already a CelestNav^TM customer, this is also the file to download for your free version update.

• CelestNav^TM 2.5 for PalmOS, MacOS archive (StuffIt format) for installation on your handheld (388 k)
• CelestNav^TM 2.5 for PalmOS, Windows archive (ZIP file) for installation on your handheld (400 k)
• CelestNav^TM for PalmOS, native PalmOS format (.PRC) for direct download to your handheld
• beta version of the next release, CelestNav^TM for PalmOS, native PalmOS format (.PRC). Updated 25 Feb 2004. Do not use 3.0beta for navigation.

Tutorial

Buy it:

$49.95. Version 1 customers receive version 2 as a free upgrade.
• Electronic delivery via eSellerate. Get your password in seconds!

  

• a CD version from Celestaire, Inc.. Or by phone at 1-888-navigate, 1-316-686-9785.

  

FAQ

Register your CD purchase

CelestNav^TM features:

• computation of fix position from celestial observations.
• perpetual nautical almanac for navigational stars, Moon, Sun, planets.
• Mercator and Great Circle sailing computation.
• computes range, height, sextant angle for lighthouses and other terrestrial objects.
• twilight, rise, set, meridian passage computation.
• automatic timing of sextant observations and adjustment to UTC.
• handles backsights, non-standard atmospheric conditions, and more.
• sight reduction screen with the functionality found in publications H.O. 229 and H.O. 249.
• continuously updated dead reckoning position.
• "finger-friendly" data entry screens for celestial observations, angles, dates, and times.

Buy these essential books:

• 2008 Nautical Almanac (Commercial edition)
• One Hundred Problems in Celestial Navigation. A collection of problem sets, with answers. Each chapter follows a segment of a voyage; the voyages are in different parts of the world, and different vessels (including a dirigible!). Gray makes no assumptions about ho w you're working the problems.

Other navigation and astronomy software

These programs are written by others, but are very helpful in navigation.

Tide Tool

First-rate tide and current prediction tool. Covers the entire world except for the British Isles. Free!

Big Clock

Clock, timer, and stopwatch program. Also the easiest way to set the Palm's clock to the nearest second. Free!

Other handheld platforms

For a celestial navigation program and starchart program that does run on PocketPC, we recommend Pocket Stars, by Nomad Electronics.

Hardware:

Buy your PalmOS handheld organizer online.