🔍 Key Concepts

• Oil Record Book (ORB) requirements in 33 CFR and MARPOL Annex I • How Mobile Offshore Drilling Units (MODUs) are treated (as ships vs. fixed platforms) for pollution regulations • Which conditions trigger ORB requirements vs. exemptions (certificates, voyage type, permits)

💭 Think About

• Ask yourself: Is the Oil Record Book requirement mainly tied to having a particular certificate, being on a certain voyage, or simply holding an environmental discharge permit? • Think about what MARPOL Annex I and U.S. oil pollution rules are trying to monitor with an Oil Record Book—does that depend on how long the voyage is, or on the vessel’s international/oceangoing status? • Consider how MODUs are regulated when they move from one place to another versus when they are stationary on location—which of the answer choices really changes whether an ORB is required?

✅ Before You Answer

• Verify which MODUs must carry an International Oil Pollution Prevention (IOPP) Certificate and how that links to ORB requirements. • Check whether simply having an NPDES (National Pollutant Discharge Elimination System) permit ever removes the need for an Oil Record Book. • Confirm whether ORB rules change based on a minimum voyage duration (such as 24 hours) or on the type of voyage (domestic vs. international/oceangoing).