What must a type 3 marine santation device have when inland?

A Type 3 marine sanitation device (MSD) must have the capability to treat sewage effectively without discharging untreated waste into navigable waters. When used inland, it must comply with local regulations and often requires a holding tank that can be emptied at designated pump-out stations. Additionally, it should be equipped with a means to prevent overboard discharge, ensuring that all waste is contained and managed properly.