🔍 Key Concepts

• 46 CFR Part 39 – Vapor Control and Emergency Shutdown requirements for tank vessels transferring oil • The purpose of an emergency shutdown during cargo transfer operations • Difference between systems related to propulsion, cargo transfer, firefighting, and electrical power

💭 Think About

• During an oil transfer between a tank vessel and a facility or another vessel, what is the main safety concern that an emergency shutdown must address first? • Which system, if stopped quickly, will most directly reduce or stop a potential pollution incident during transfer? • Which options affect the ship’s ability to maneuver or fight a fire, versus directly affecting the movement of the oil being transferred?

✅ Before You Answer

• Identify which option directly controls or stops cargo/transfer flow rather than ship movement or power in general • Eliminate choices that would reduce the vessel’s ability to respond to an emergency, such as maneuvering or firefighting • Confirm that the regulation focuses on preventing or limiting oil discharge/pollution during transfer operations