🔍 Key Concepts

• Marine Sanitation Devices (MSDs) are equipment that treat or hold sewage on vessels • Each CFR (Code of Federal Regulations) number and section generally groups similar topics together • Look at how 33 CFR Parts 151–159 are organized by subject (e.g., pollution, oil, garbage, equipment)

💭 Think About

• Which of these sections would most likely cover equipment installed on vessels for treating or holding sewage, rather than procedures for transferring oil or handling spills? • Think about what topics are usually in the 150s of 33 CFR—do they relate more to oil pollution, dangerous liquid transfer, or vessel equipment standards? • If you had to look up how an onboard toilet/holding tank must be designed and certified, which section heading seems most logical?

✅ Before You Answer

• Check which section number is commonly associated with vessel equipment standards rather than operational rules • Verify which sections (153, 155, 156) you recognize from oil or hazardous material pollution control—those are likely not about sewage devices • Confirm that the section you choose actually mentions sanitation or sewage in its title or scope