Field guide · Operating Instructions
Purpose and safe boundaries
Step-by-step setup and use of handheld radios, weather receivers, marine VHF, legal channels and emergency traffic.
Reviewed: November 2026. This educational guide does not replace accredited training, equipment manuals, local rules, medical professionals or live emergency instructions.
Before switching on
Read the device-specific manual and check local radio regulations. Identify whether it is a receive-only weather scanner, a licence-free two-way radio, a licensed amateur radio or a marine VHF set. These are not interchangeable. Check antenna, battery, contacts, display and charger, and keep a waterproof frequency plan.
Ordinary handheld two-way radio
- Charge the battery; inspect antenna and connector. If a removable antenna is required, fit the approved antenna before transmitting.
- Select a legal, pre-agreed channel and any matching squelch/code settings. Test the link while in contact with a partner.
- Listen first. Hold the push-to-talk button, wait briefly, identify who you are calling and who is speaking; then release to hear the reply.
- Speak slowly, one idea at a time. Spell critical names using the phonetic alphabet, read coordinates back, and log message time and receipt.
- Set check-in intervals and preserve battery by limiting unnecessary transmissions.
Weather radio / broadcast receiver
Choose a receiver that supports your country’s alert service. In the United States, NOAA Weather Radio requires a compatible receiver, not just a regular FM set. Tune the local station, set location/SAME codes when available, verify alert mode and battery backup, and test using the manufacturer’s procedure. The availability and frequencies of broadcast alerts differ outside the US.
Marine VHF and DSC distress procedure
When grave and imminent danger exists: on an appropriately registered and configured DSC-equipped marine set, use the distress function according to the exact device manual, then make a voice distress call on marine VHF Channel 16 (156.8 MHz). Say MAYDAY three times, vessel identification, location, nature of danger, assistance needed and people aboard. Release the microphone to listen. Stay on the channel unless instructed otherwise. Verify MMSI and GPS integration before departure; accidental DSC alerts must be cancelled using official procedures.
Routine traffic: listen, make a brief call on the appropriate calling channel and shift to an authorized working channel. Keep Channel 16 clear for safety traffic.
Radio log card
- Radio type / channel / frequency / legal authorisation
- Call signs and primary / backup contact windows
- Current GPS coordinates or map grid, with coordinate system
- Message, time, operator and reply / acknowledgment
- Battery status and next check-in time
Related survival guides
References and further reading
Checked against publicly available guidance; verify local rules and the manufacturer’s current manual before use.