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Course Outline

Pump-out sign

Signs like this one are posted at pump-out stations.

You are not required to have an installed toilet on your vessel. Many people use portable toilets and dispose of the waste at a public launch that has a pump-out station equipped for portable toilets. Encourage everyone to use the onshore restrooms before casting off. For long outings, equip your vessel for sewage with toilet facilities.

If you have a recreational vessel with installed toilet facilities, federal law states that it must have an operable marine sanitation device (MSD) on board.

There are three types of MSDs.

  • Types I and II MSDs are usually found on large vessels. Waste is treated with special chemicals to kill bacteria before the waste is discharged. Types I and II MSDs with Y valves that would direct the waste overboard must be secured so that the valve cannot be opened. This can be done by placing a lock or non-reusable seal on the Y valve or by taking the handle off the Y valve.
  • Type III MSDs provide no treatment and are either holding tanks or portable toilets. Collected waste should be taken ashore and disposed of in a pump-out station or onshore toilet.

Vessels 65 feet or less in length may use a Type I, II, or III MSD. Vessels more than 65 feet in length must install a Type II or III MSD.

All installed devices must be USCG certified.

MSD at pump-out station
Typical Marine Sanitation Device - Y valve must be closed - Drainage to pump-out station
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