This book contains a complete copy of the Inland and International Navigation Rules as presented by the United States Coast Guard. In addition all Notice to Mariners updates to date, 1/1/2012 are incorporated within the text. The Coast Guard requires that an up-to-date copy of Navigation Rules such as this one be carried on all vessels 12 meters (39 feet) or more in length at all times. We have also included detailed instructions on how to log on to the NIMA website to monitor Notice to Mariner notifications so you can keep your book up-to-date. This book also includes an annotated table of contents to help the reader find the rule they seek; no such feature is found in the government edition.