In accordance with international MARPOL Annex V regulations and federal regulations under 33CFR Subchapter O, the prohibition of the discharge of dunnage, lining, and packing materials that float applies to a vessel operating within how many nautical miles of the nearest land?

Correct Answer: Option C — 25 nautical miles

Under 33 CFR 151.69, the discharge of dunnage, lining, and packing materials that float is prohibited within 25 nautical miles of the nearest land. This regulation aims to prevent floating debris from washing ashore or creating navigational hazards for smaller vessels operating near coastal waters.