This specification covers the material, design, manufacture, performance, operation, functioning, and testing requirements for United States Coast Guard (USCG) Type II Marine Sanitation Devices or IMO MARPOL 73/78 Annex IV flow through treatment device intended to process sewage and graywater generated during the ship's normal service. It is intended for use by purchasers, designers, and manufacturers of shipboard environmental pollution control equipment to determine the requirements for equipment purchase, equipment use, and design considerations. The marine sanitation devices shall perform accordingly to the following tests: vibration test; shock test; rolling test; pressure test; pressure and vacuum pulse test; temperature range test; chemical resistance test; operability test; sewage processing test; coliform test; suspended solids test; and ignition prevention test. Aside from meeting the requirements set forth herein, the devices shall also be designed and installed to conform to human engineering principles to th degree that it can be operated and maintained by males and females of specified heights.