🔍 Key Concepts
• Interpret how a light’s characteristics are written, especially Fl (2) 10s 17m 21M (what is height vs range vs period?).
• Use Chart No. 1 bottom-type abbreviations to decode symbols like S Co and hrd S Co.
• Understand common chart symbols near islands for eddies/overfalls and for depth contours such as the 5‑meter line.
💭 Think About
• For choice A, which number on the light description actually tells you how far away the light can be seen, and what do the other numbers mean?
• For choices B and C, compare the exact wording in the answer (e.g., “soft coral” or “dangerous eddy”) to the exact chart abbreviations and symbols shown. Do they match perfectly, or is there a subtle difference?
• For choice D, carefully trace the 5‑meter contour west of Beito Island and read every sounding inside it. Do you see a depth that matches the description, or something different (such as a height on land)?
✅ Before You Answer
• Confirm from light characteristics that you are not confusing height in meters with range in miles.
• Verify from Chart No. 1 what S Co actually stands for, and whether it really means soft coral.
• Check that any “eddy” symbol is actually labeled or indicated as dangerous, not just a current feature, and that any “12” you see is a depth, not a height on land.