You depart LAT 49°38'N, LONG 152°49'E, for LAT 49°38'N, LONG 176°12'E. What are the course and distance by parallel sailing?

Correct Answer: Option C — 090°T, 909 miles

Under Bowditch parallel sailing rules, distance equals $D\text{Lo}$ multiplied by the cosine of the latitude. Steaming eastward across the computed $D\text{Lo}$ along latitude $49^\circ38'\text{N}$ gives a course of $090^\circ\text{T}$ and distance of $909$ miles.