StacksVerified U.S. regulatory reference

46 CFR §144.610

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
A vessel of more than 65 feet (19.8 meters) in length with overnight accommodations must have a mechanical ventilation system unless a natural system, such as opening windows, portholes, or doors, will provide adequate ventilation in ordinary weather.