GroundRules
33 CFR 174.23: Form of number.
Where this section sits in the code
- Title 33—Navigation and Navigable Waters
- CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
- SUBCHAPTER S—BOATING SAFETY
- PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS
- Subpart B—Numbering System Requirements
(a) Each number must consist of two capital letters denoting the State of the issuing authority, as specified in appendix A of part 173 of this chapter, followed by—
(1) Not more than four numerals followed by not more than two capital letters (example: NH 1234 BD); or
(2) Not more than three numerals followed by not more than three capital letters (example: WN 567 EFG).
(b) A number suffix must not include the letters “I”, “O”, or “Q,” which may be mistaken for numerals.
Collected 2026-08-27T02:25:35Z. Source file · JSON