33 CFR § 175.115 - Exceptions.

The following persons need not comply with § 175.110; however, each must carry on board visual distress signals suitable for night use, selected from the list in § 175.130 or § 175.135, in the number required, between sunset and sunrise:

(a) A person competing in any organized marine parade, regatta, race, or similar event;

(b) A person using a manually propelled boat; or

(c) A person using a sailboat of completely open construction, not equipped with propulsion machinery, under 26′ in length.