Question 1606Navigation General

The correct answer is A) longitude. The angle at the pole measured through 180° from the prime meridian to the meridian of a point is the definition of longitude. Longitude represents the east-west position of a point on the Earth's surface, measured in degrees east or west from the prime meridian at Greenwich, England. The other options are incorrect because: B) The polar arc refers to the arc of a great circle passing through the geographic poles. C) The Greenwich hour angle is the angle between the observer's meridian and the meridian of Greenwich. D) Departure refers to the distance traveled east or west, not the angle at the pole.