You are on a voyage from Cape May (LAT 39°50'N, LONG 74°45'W) to the English Channel (LAT 49°00'N, LONG 05°00'W). What will NOT prohibit the use of a great circle track from departure to arrival? (Use gnomonic chart WOXZC 5274.)

Correct Answer: Option B — The high latitude in which the vertex lies

Great circle tracks are mathematically defined by the shortest path on a sphere. While hazards like icebergs or landmasses (Options A, C, D) physically prohibit a specific track, the vertex's high latitude is a geometric property of the route, not an external navigational constraint or hazard that prohibits the track's use.