🔍 Key Concepts

• Difference between permanent publications and frequently updated notices • Which agency issues short‑term changes to Aids to Navigation (ATON) such as buoys • Special considerations for river conditions like high water between Baton Rouge and Cairo

💭 Think About

• Ask yourself: which option is specifically designed to report recent or temporary changes to buoys, channels, and other aids? • Consider which choices are more like reference books/charts versus regular bulletins or updates. • Think about who is responsible for maintaining and announcing changes to buoys on U.S. inland waters.

✅ Before You Answer

• Identify which choice is issued frequently (weekly or regularly) rather than only when a new edition is published. • Determine which option is known for listing recent changes, discrepancies, or temporary relocations of buoys. • Verify which resource mariners are required or strongly encouraged to check for current conditions before transiting a river during high water.