Basic Qualification · B-003 Station assembly, practice and safety · B-003-015-009
What feature of packet radio makes it especially useful for emergency communications?
- A Reliable messaging (guaranteed delivery or notification of failure)
- B Packet functionality is included in most modern radios
- C Capable of simultaneous voice, image and data transmission
- D Encrypted signals prevent eavesdropping
Correct answer: A — Reliable messaging (guaranteed delivery or notification of failure). From the official ISED question bank, verified word for word.
Why
Packet radio automatically checks if a message arrived safely and asks the sender to resend it if the signal was lost, ensuring critical emergency information is not dropped. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.