Section 665.16 - Vessel identification(a) Applicability. Each fishing vessel subject to this part, except those identified in paragraph (e) of this section, must be marked for identification purposes, as follows: (1) A vessel that is registered for use with a valid permit issued under § 665.801 and used to fish on the high seas within the Convention Area as defined in § 300.211 of this title must be marked in accordance with the requirements at §§ 300.14 and 300.217 of this title.(2) A vessel that is registered for use with a valid permit issued under § 665.801 of this part and not used to fish on the high seas within the Convention Area must be marked in accordance with either:(i) Sections 300.14 and 300.217 of this title, or(ii) Paragraph (b) of this section.(3) A vessel that is registered for use with a valid permit issued under subparts B through E and subparts G through I of this part must be marked in accordance with paragraph (b) of this section.(b) Identification. Each vessel subject to this section must be marked as follows: (1) The vessel's official number must be affixed to the port and starboard sides of the deckhouse or hull, and on an appropriate weather deck, so as to be visible from enforcement vessels and aircraft. Marking must be legible and of a color that contrasts with the background.(2) For fishing and receiving vessels of 65 ft (19.8 m) LOA or longer, the official number must be displayed in block Arabic numerals at least 18 inches (45.7 cm) in height, except that vessels in precious coral fisheries that are 65 ft (19.8 m) LOA or longer must be marked in block Arabic numerals at least 14 inches (35.6 cm) in height.(3) For all other vessels, the official number must be displayed in block Arabic numerals at least 10 inches (25.4 cm) in height.(c) The vessel operator must ensure that the official number is clearly legible and in good repair.(d) The vessel operator must ensure that no part of the vessel, its rigging, or its fishing gear obstructs the view of the official number from an enforcement vessel or aircraft.(e) The following fishing vessels are exempt from the vessel identification requirements in this section: (1) A vessel registered for use under a MHI non-commercial bottomfish permit that is in compliance with State of Hawaii bottomfish vessel registration and marking requirements.(2) A vessel less than 40 ft (12.2 m) LOA registered for use under a CNMI commercial bottomfish permit that is in compliance with CNMI bottomfish vessel registration and marking requirements. 75 FR 2205 , Jan. 14, 2010, as amended at 75 FR 3417 , Jan. 21, 2010; 78 FR 33003 , June 3, 2013; 78 FR 39583 , July 2, 2013