Celesticomp V Celestial Calculator
Celesticomp is the celestial calculator by which all others were judged.
For neophyte celestial navigators, it introduced you to the concepts
without requiring tedious and error-prone calculations. For experienced
navigators, its saved time and reduced calculation errors. And for
everyone, it eliminated the need to buy any almanac at all, because all
the data needed is built in to Celesticomp's permanent memory: all 173
stars in The Nautical Almanac, the sun, moon, and all the visible
planets. It does running fixes, averages LOPs and gives you a fix --
even identifies unknown bodies. It prompts you in plain English for the
information it needs, and lets you check your input before calculating.
It's very easy to use, and comes with a comprehensive instruction book.
Fits in a shirt pocket and weighs just 3 ounces. It uses 2 readily available 2032 button cell lithium batteries.