1. PURPOSE. This Handbook provides the safest, most efficient methods, techniques, and informational guidance possible to navigate boats in maritime environments and situations. Major topics within this handbook are aids to navigation (ATON) and navigation. 2. DIRECTIVES AFFECTED. The Boat Crew Seamanship Manual, COMDTINST M16114.5C, is canceled. 3. DISCUSSION. The subjects and principles discussed herein include U.S. Aids to Navigation system and maritime navigation principles and application. 4. MAJOR CHANGES. First issue. 5. DISCLAIMER. This guidance is not a substitute for applicable legal requirements, nor is it itself a rule. It is intended to provide operational guidance for Coast Guard personnel and is not intended to nor does it impose legally-binding requirements on any party outside the Coast Guard. 6. IMPACT ASSESSMENT. No impact assessment warranted.