To be in compliance with U.S. Federal Ballast Water Management regulations, which of the following procedures may be followed by an ocean vessel entering U.S. waters returning from an international voyage? -

Correct Answer: Option D — All of the above

U.S. Ballast Water Management regulations under 33 CFR Part 151 require ocean-going vessels entering U.S. waters to manage ballast via retaining water onboard, conducting an oceanic exchange at least 200 nautical miles offshore, or utilizing Coast Guard-approved treatment systems.