Basic Qualification · B-002 Operating and procedures · B-002-003-005
Why should local communications use VHF and UHF frequencies instead of HF frequencies?
- A To minimize clutter on HF bands more appropriate for long-distance communication
- B Because greater output power is permitted on VHF and UHF
- C Because HF transmissions are not propagated locally
- D Because signals are stronger on VHF and UHF frequencies
Correct answer: A — To minimize clutter on HF bands more appropriate for long-distance communication. From the official ISED question bank, verified word for word.
Why
HF frequencies are special because they naturally bounce off the upper atmosphere to travel across continents, making them the best choice for long-distance contacts. The full explanation — and one for every question — is in Pro.
Practise this section
How to operate: calling, phonetics, Q-signals, repeaters, nets, emergency traffic, and the courtesies that keep a band usable.