A vessel steams 1106 miles on course 249°T from LAT 13°30.0'N, LONG 144°30.3'E. What is the latitude and longitude of the point of arrival by Mercator sailing?

Correct Answer: Option A — LAT 06°54.0'N, LONG 127°08.0'E

Using distance and true course data, Mercator sailing formulas from Bowditch determine the latitude of arrival via difference in latitude and the longitude via departure factored by middle latitude or meridional parts.