You depart LAT 40°42.0'N, LONG 74°01.0'W, and steam 3365.6 miles on course 118°T. What is the longitude of your arrival by Mercator sailing?

Correct Answer: Option A — 17°41.0'W

Mercator sailing calculates the difference in longitude using the formula: diff long = meridional parts difference multiplied by the tangent of the true course. Applying departure coordinates against course 118°T yields arrival longitude 17°41.0'W, adhering to standard Bowditch computational procedures.