What type of marine sanitation device (MSD) must be operable on a vessel with installed toilet facilities?

A vessel equipped with toilet facilities must have a specific type of marine sanitation device (MSD) that effectively manages waste. The appropriate devices for this situation are Type I or Type II MSDs.

Type I MSDs treat waste using advanced marine sanitation technology, allowing it to be discharged overboard into the water, but only when the vessel is a certain distance from shore. They are designed to reduce pathogens significantly, making the waste less harmful when released into the environment.

Type II MSDs provide a higher level of treatment than Type I, ensuring that the waste discharge is safe and compliant with environmental regulations. They are typically used in locations with stricter discharge standards, further supporting marine wildlife and water quality.

This requirement ensures vessels are equipped with proper sanitation systems that protect the health of marine environments and adhere to federal and state regulations regarding waste disposal.

Other types of MSDs mentioned, such as Type S, Type III, and Type IV, do not meet the operational and regulatory requirements for vessels with installed toilet facilities, which is why they are not suitable choices in this context.