ATPL: Which definition of the equator is correct?
Domanda 147, General Navigation - ATPL - Airline Transport Pilot license
| The equator is a greatcircle with its plane perpendicular to the Earth rotational axis. |
| The equator is a small circle with its plane perpendicular to the Earth rotational axis. |
| The equator is a small circle, the plane is parallel to the Earth rotational axis. |
| The equator is a greatcircle with its plane parallel to the Earth rotational axis. |
