PPL(A) EN: Quasi-optical waves travel...
Domanda 89, Navigation - PPL(A) English - Private Pilot License (Aircraft)
| Along the surface of the earth |
| Through the air directly from the transmitter to the receiver. |
| Through the air and are influenced (e.g. reflected) by the ionosphere |
| Along the surface of the earth, but are absorbed by the sea. |
