🔍 Key Concepts

• Environmental protection regulations for operating in fresh or brackish waters • How ships prevent invasive species transfer when changing between salt, brackish, and fresh water • Differences between ballast water procedures and normal pre-sailing checks

💭 Think About

• Ask yourself: which option is clearly tied to protecting the local ecosystem when entering fresh or brackish water? • Consider which task is usually a regulatory requirement rather than just good housekeeping or maintenance. • Think about which actions are done routinely everywhere versus which are special procedures related to changing water types.

✅ Before You Answer

• Verify which option directly addresses environmental/ballast management rules, not just recordkeeping or cleaning. • Check whether the action would realistically be required before getting underway, not after arrival or during voyage. • Eliminate choices that sound like general good practice but are not specifically linked to fresh or brackish water conditions.