NavRules 3.0

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 M16672.2rDC). 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 an Adobe Acrobat (PDF) file for easy reference.