WASHINGTON, DC The US Coast Guard made a few changes in the Navigation Rules (commonly known as the "rules of the road") in the late summer of 1999 that may have gone unnoticed. The current rules are in the Navigation Rules booklet with the following number on the spine: COMDTINST M16672.2D. Numbers that end in C, B, or A are outdated.
Some changes in lights and other areas (including the addition of new rules) affect the substance of an Inland Rule (applicable near shore) independent of an International Rule (applicable offshore). A few changes bring Inland Rules into conformity with International Rules. Other changes are in definitions, terminology, or grammar.
To be safe, purchase the new edition of the Navigation Rules booklet, compare it with the old edition, and then throw out the old one.
The following Inland Rules were changed:
