OUPV & 100-Ton Master · Pollution — Marine Sanitation Device
A vessel with an installed toilet on U.S. navigable waters must have:
- AA Coast Guard-certified marine sanitation device (MSD), with overboard discharge secured in no-discharge zones✓ Correct
- BNo treatment of any kind
- COnly a bucket
- DA device of any type, certified or not
Explanation
Vessels with installed heads must use a certified MSD (Type I, II, or III). In No Discharge Zones and inland waters, the overboard discharge of even treated sewage may be prohibited, so the Y-valve must be secured to prevent discharge and waste retained for pump-out.
Authority: 33 CFR Part 159; Clean Water Act
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