CFR › Title 33 › Part 187 › §187.933 CFR §187.9Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)The vessel identifier for a vessel having a valid HIN is the HIN.(b)If a vessel does not have a valid HIN, a vessel identifier is assigned under the following table: