You are planning a voyage from Cape May (LAT 38°45'N, LONG 74°45'W) to Lisbon (LAT 38°37'N, LONG 09°45'W). Which of the following is TRUE? (Use gnomonic chart WOXZC 5274)

Correct Answer: Option D — The northern hemisphere vertex is approximately at longitude 42°26'W.

On a great circle track between Cape May and Lisbon, the highest latitude (vertex) occurs near longitude 42°26'W. Gnomonic tracking charts like WOXZC 5274 display great circle paths as straight lines, making vertex identification straightforward per Bowditch instructions.