Basic Qualification · B-007 Radio wave propagation · B-007-003-001
What term describes an area that is too distant for reception of ground waves, but too close for reception of ionospheric waves?
- A Propagation zone
- B Skip zone
- C Shadow zone
- D Scatter zone
Correct answer: B — Skip zone. From the official ISED question bank, verified word for word.
Why
A skip zone is the silent gap where your signal cannot be heard because ground waves fade out before reaching it, while sky waves bounce off the ionosphere and land too far away. The full explanation — and one for every question — is in Pro.
Practise this section
How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.