The MSD Type III device is described in which regulation number?

• A. 33 CFR 159.3
• B. 46 CFR 147
• C. IMO Res MEPC.76(40)
• D. 33 CFR 155.1

Answer: (A)

Marine sanitation devices on ships are defined and regulated in 33 CFR Part 159, which covers requirements for how sewage is treated or handled on board. The section 159.3 specifically lays out the definitions of the different MSD types, including Type I, Type II, and Type III, and describes how each type is approved and used. That’s why the MSD Type III device is described in this regulation. In contrast, the other options refer to different regulations or international guidance that do not define the Type III MSD. Type III devices are typically holding-tank systems that do not discharge sewage at sea and must be pumped ashore or to an approved reception facility.