🔍 Key Concepts

• Chart symbols and notes related to seabed composition, restricted areas, and jurisdictional boundaries • Differences between Inland Rules and International (COLREGS), including where each applies • Definitions of territorial sea and contiguous zone and how they’re shown or implied on charts

💭 Think About

• Look at what information you would normally have about your 0400 position from a chart or passage plan. Which of the four options is something you could reliably determine just from that plotted position? • Consider which options describe very specific local conditions (like bottom type or local prohibitions) and which describe broader legal or regulatory zones. • Ask yourself: at 0400, on a typical exam chart problem, what kind of note, symbol, or boundary line would you have had to cross or be inside of to make one of these statements true?

✅ Before You Answer

• Identify whether your 0400 position is inside any area marked with prohibited or restricted fishing/anchoring on the chart legend or notes. • Determine whether the position lies inland of the demarcation line between Inland and International Rules (often shown on charts or in COLREGS demarcation listings). • Verify how far your 0400 position is from the nearest baseline/shore to see if it’s within territorial sea (12 NM) or contiguous zone (24 NM).