Section 300.173 - Vessel identificationEach U.S. vessel fishing under the Treaty must be marked for identification purposes, as follows:
(a) A vessel used to fish on the high seas within the Convention Area as defined in § 300.211 must be marked in accordance with the requirements at §§ 300.14 and 300.217 .(b) A vessel not used to fish on the high seas within the Convention Area as defined in § 300.211 must be marked in accordance with either:(1) Sections 300.14 and 300.217 , or(2) The vessel's name and U.S. Coast Guard Documentation number (or if not documented, the state registration number) followed by the letter U must be prominently displayed where they are clearly visible both from the air and from a surface vessel. Numerals and the letter U must meet the size requirements of § 660.704 of this title. Markings must be legible and of a color that contrasts with the background.76 FR 73520, Nov. 29, 2011