Basic Qualification · B-007 Radio wave propagation · B-007-007-010
Excluding enhanced propagation modes, what is the approximate range of normal VHF tropospheric propagation?
- A1600 km
- B800 km
- C2400 km
- D3200 km
Correct answer: B — 800 km. From the official ISED question bank, verified word for word.
Why
Normal VHF signals travel in straight lines and are limited by the curve of the Earth, typically reaching about 800 km when atmospheric conditions are average. The full explanation — and one for every question — is in Pro.
Practise this section
Radio wave propagation is section B-007 of the Basic exam: How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.
Drill B-007 — free, no account