🔍 Key Concepts

• Plotting a course between two charted positions using latitude and longitude • Converting true course to magnetic and then to standard compass (psc) using variation and deviation • Difference between "per standard compass" and "per gyro" or "per magnetic"

💭 Think About

• After plotting the line from Quonochontaug Pond entrance to Great Salt Pond, is your direction generally southeast, south-southeast, or another quadrant from your starting point? • When you convert from true to compass, are you carefully applying the local variation with the correct east/west sign, and then the deviation from the deviation table or exam data? • Are you remembering that a standard magnetic compass course must include both variation and deviation corrections, not just one of them?

✅ Before You Answer

• Verify the exact charted positions of both entrances and draw/measure the true course with parallel rulers or a protractor • Confirm the local magnetic variation and its direction (E or W) from the chart and apply the correct arithmetic ("add west, subtract east" for converting true to magnetic) • Make sure you apply the correct deviation value for the heading range you obtain, then adjust magnetic to standard compass to compare with the answer choices