Section 143.415 - Navigation lights(a) Towing vessels more than 65 feet in length must use navigation lights that meet UL 1104 (incorporated by reference, see § 136.112 of this subchapter) or other standards accepted by the Coast Guard.(b) Towing vessels 65 feet or less in length may meet the requirements listed in 33 CFR 183.810 or paragraph (a) of this section.