What is TheoNav?

TheoNav is a shareware Palm OS application that includes tools and calculators to aid in maritime navigation.

Specifically, TheoNav includes tools for:

• Speed, Time and Distance calculations
• Determining distance and heading between any two locations on Earth
• Quick conversion between English, metric, statute and nautical units
• Calculation of magnetic variation anywhere on the Earth
• Curve-fitting for calculating magnetic compass deviation
• Determining locations of U.S. cities and world ports
• Vector addition of speed and heading when travelling through currents

2025 Magnetic Model is Now Available

The World Magnetic Model used by TheoNav has a lifetime of five years. For the most accurate predictions of magnetic variations, please download and install the latest magnetic model, WMM-2025.pdb, and install it on your Palm OS device.

For the latest features, upgrade to version 2.1.1 of TheoNav

Version 2.1.1 is a bug fix, released April 23, 2008. It fixes a bug that seems to only occur on the Palm T|X when entering compass deviation data. It is strongly recommended that you upgrade to this version.

Version 2 has several new features that will make TheoNav more enjoyable to use. Specifically:

• Save a position in your list of "Favorites"
  Know the coordinates of a waypoint and want to save it for future reference? Just click the "Fav" button.
• Improved database management
  Delete old databases easily, rename them, or beam them to your friends!
• Search for Locations
  Just type a few letters of the name of a location to find it quickly.
• Location databases are indexed
  Indexed databases mean faster searches.
• Multiple formats for latitude and longitude
  Enter lat and long coordinates in degrees/minutes/seconds, degrees/minutes, or in decimal degrees. Easily switch between formats.
• Full documentation available online
  Check it out here.
• Garmin iQue Support
• Numerous bug fixes and improved layout