About NavRules

NavRules for Windows is a training program for learning the 72 COLREGS and the Inland Navigation Rules. Specifically, NavRules contains the complete set of light patterns, dayshapes, and sound signals that are listed in the United States Coast Guard Navigation Rules, International and Inland (COMDTINST M16672.2C). These lights, dayshapes, and sound signals form the foundation of an internationally recognized method of recognizing vessels and obstructions in various degrees of visibility. The complete set of these rules is also provided as a Windows help file for easy reference. NavRules also contains a companion program that teaches the international code flags used on many commercial and foriegn vessels.

NavRules for Windows is a shareware program that will run on Windows 3.x, 95, or NT. You may use it on a trial basis for 30 days, after which you must register the program for a mere $20. The version of NavRules that is available here is fully functional, so what you see is what you get. When you register NavRules you will receive a copy of the latest version on diskette and automatic notification of future major releases of NavRules, not to mention the eternal gratitude of the author!

Want to see what NavRules for Windows looks like without downloading the entire program? Take a look at these two GIF images to see some screen shots!

A sailboat with optional running lights.

A vessel restricted in it's ability to maneuver displaying obstruction lights on its port side.