A vessel at LAT 20°00'N, LONG 107°30'W is to proceed to LAT 24°40'N, LONG 112°30' W. What is the course and distance by mid-latitude sailing?

Correct Answer: Option B — 315.3°T, 394.0 miles

Mid-latitude sailing formulas calculate difference of latitude, difference of longitude, and middle latitude. Applying departure and latitude scaling factors determines the rhumb line course of 315.3°T and distance of 394.0 miles in compliance with standard Bowditch piloting methods.