🔍 Key Concepts

• Impressed current cathodic protection (ICCP) vs. sacrificial anodes – how each protects steel hulls • The need to protect all underwater metal parts electrically connected (or not) to the hull • How bonding/grounding straps help make different metal parts share the same electrical potential

💭 Think About

• Which choice talks specifically about underwater metal components that might corrode if they are not electrically tied into the protection system? • Ask yourself: for cathodic protection to work, what must be true about the electrical connection between the hull, rudder, and propeller shaft? • Which options are clearly about other ship systems (like power generation or magnetism) rather than about corrosion and underwater metal protection?

✅ Before You Answer

• Verify which answer involves electrical continuity or bonding between hull, rudder, and propeller shaft. • Eliminate any option that does not deal with corrosion or cathodic protection of underwater metals. • Check that the feature you choose would actually extend the protection of the ICCP system to more metal surfaces underwater.