A great circle is defined as:
Domanda 33, General Navigation - ATPL - Airline Transport Pilot license
| A circle in any plane on the surface of a sphere. |
| A circle running on the outside of the sphere. |
| A circle on the surface of a sphere, whose plane is cutting through the centre of the sphere. |
| A circle on the surface of the sphere, with its plane running perpendicular to the axis of rotation. |
