🔍 Key Concepts

• Coast Pilots and charts are publications that need regular corrections as hazards, buoys, and regulations change • There is an official system mariners use to update charts and publications between new editions • Understand the normal purpose of pilot charts, tide tables, and current tables

💭 Think About

• Which option is specifically designed to provide chart and publication corrections issued by official hydrographic authorities? • Which books or tables are mainly for predicting water levels or flow, rather than for reporting chart corrections? • If a buoy is moved or a new danger is discovered, which of these options would officially announce that change to all mariners?

✅ Before You Answer

• Identify which choice is an official update service rather than a reference or prediction book • Eliminate any choices that are used mainly for predictions (future tides/currents) instead of corrections • Ask: Which item would you regularly check to apply corrections in the margins of your charts and Coast Pilots?