1. PURPOSE. This instruction forwards International and Inland Navigation Rules and Regulations for use by Coast Guard personnel.

2. DIRECTIVES AFFECTED. The following publication is hereby cancelled:

a.

"Navigation Rules, International

On 1 March 1983, the Inland Rules became effective on the
Great Lakes, completing the unification of navigation
rules within the United States. For the first time in
this century, mariners need to know only one set of rules
of the road to ply any waters inside the navigational
lines of demarcation called COLREGS, Demarcation Lines.
On 1 June 1983, 55 amendments to the International Reg-
ulations for Preventing Collisions at Sea, 1972 (72
COLREGS) became effeative These amendments,,which were
anticipated when the Inland Rules were written bring the
two sets of Rules closer together. Some differences do
remain between the Inland and International Rules. The
side-by-side presentation of Rules in this book will
allow the mariner to determine those differences quickly.

Auxiliary National Supply Center (ANSC) (100)

THE UNIVERSITY OF MICHIGAN
ENGINEERING LIBRARY

For sale by the Superintendent of Documents, U.S. Government Printing Office
Washington, D.C. 20402.

COMDTINST M16672.2A

28 DEC 1983

3. C.

4.

5.

6.

П 4421 2551

1984

The primary purpose for revision of COMDTINST M16672.2 is to incorporate the amendments into 72 COLREGS and delete the italicized material which was superseded on 1 June 1983. This will make the Rules easier to read. Other minor changes to the publication were made. Some of these are the addition of two pictures following Rule 24(d), inclusion of interpretative rules, the insertion of minor amendments to the Vessel Bridge-to-Bridge Radiotelephone Regulations, and creation of a new legal citations page just before the conversion table at the end of the book.

ORDERING INFORMATION.

a.

b.

Following initial distribution of this publication, units may request additional copies by sending a completed form CG-4428 to Commandant (G-CMA-3). Once the supply at Headquarters is exhausted, units must procure the book directly from the U.S. Government Printing Office (GPO) using unit funds. A COMDTNOTE will follow publication of this book with price and GPO stock number when they

become available.

This publication is not available for free issue to the public. Therefore, the public must be referred to the Government Printing Office order desk at (202) 783-3238 to obtain cost, stock number, and availability. The cost and stock number will be included in the COMDTNOTE (see para. 4.a., above). When the COMDTNOTE is issued, the public may be provided with the information and asked to order from the local GPO bookstore or from:

Superintendent of Documents

U.S. Government Printing Office
Washington, D.C. 20402

ACTION. Area and District Commanders are responsible for
enforcement of Navigation Rules and Regulations.

CHANGES AND CORRECTIONS. Notices of changes to Navigation Rules and Regulations will appear in the Federal Register, Weekly Notice to Mariners, and Commandant Notice. Comments and information as to errors or omissions should be addressed to Commandant (G-NSR).