Marine Sanitation Device (MSD)


On-board equipment for handling sewage; must meet state or federal pollution regulations (Type I, II, or III); covered in boater education as part of environmental stewardship.

Related Terms

Liveaboard Regulations

Rules governing those who reside on their boats, including marine sanitation, docking time limits...

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Federal Regulations

Boating rules set by the US Coast Guard or other federal entities (e.g., EPA for marine pollution...

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Overboard Discharge Rules

Laws prohibiting the dumping of trash, oil, or sewage directly into waterways; states and the USC...

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Dockside Pump-Out Station

Facilities for boats equipped with holding tanks to properly dispose of sewage (Type III MSD). Re...

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Y-Valve

A plumbing component in some boats directing waste either to an onboard holding tank or overboard...

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State Regulations

Laws established by individual states concerning boater education, vessel registration, equipment...

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Gate Valves for Seacocks

Valves controlling seawater intake/outflow on inboard engines or toilets. Properly maintained sea...

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Portable Marine Toilets

Self-contained sanitary devices for smaller boats without a permanent head; proper disposal is re...

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