A correct definition of longitude is:
Domanda 381, General Navigation - ATPL - Airline Transport Pilot license
| The east-west distance between greenwich and the place. |
| The difference between the greenwich meridian and the meridian of the place, measured at the centre of the Earth. |
| The arc at equator between the greenwich meridian and the meridian of the place, measured in degrees, minutes and seconds named East or West. |
| The angle between the greenwich meridian and the meridian of the place. |
