Determine the distance from LAT 34°18'S, LONG 172°40'E to LAT 34°18'S, LONG 152°38'E, by parallel sailing.

Correct Answer: Option B — 993.0 miles

Parallel sailing formula distance equals departure times secant of latitude. Given positions share LAT 34°18'S, the difference in longitude is 20°02' (1,202 miles). Multiplying by cosine of 34°18' yields 993.0 miles per Bowditch Volume II methods.