🔍 Key Concepts

• Great-circle vs. rhumb line distance on a chart • How to use the latitude scale on the side of the chart to measure distance in nautical miles • Difference between nautical miles and statute miles when reading answers

💭 Think About

• From your 0731 fix, how would you plot the straight-line course to Wilmington, DE on the chart you’re using? • Once that line is drawn, where exactly on the chart should you place your dividers to convert that line into a distance in nautical miles? • After measuring in nautical miles, how would you convert to statute miles if the exam expects coastwise distance in miles instead of nautical miles?

✅ Before You Answer

• Confirm you are using the latitude scale, not the longitude scale, to measure distance • Verify whether the chart and exam solution expect nautical miles or statute miles and convert if necessary (1 NM ≈ 1.15 SM) • Make sure you are measuring from the correct 0731 fix position and to the precise coordinates of Wilmington, DE: LAT 39°43.2'N, LONG 75°31.5'W