§ 3.18 May I snorkel or underwater dive in park waters?
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) Snorkeling and underwater diving is allowed in park waters, subject to closures or restrictions designated by the superintendent in accordance with §§ 1.5 and 1.7 of this chapter.
(b) In waters open to the use of vessels, a diver must prominently display a dive flag during dive operations. A dive flag must not be displayed unless dive operations are ongoing.
(c) The dive flag must be illuminated when dive operations take place between sunset and sunrise. The dive flag illumination may not consist of lights that may be confused with navigation lights or aids to navigation lights.
(d) While on the surface, submerging or surfacing the diver must remain within a 100 feet horizontal radius of the diver flag.
(e) If State laws or regulations exist concerning snorkeling activities, those provisions of State law or regulation are adopted.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.