Communication Best Practices (VHF Marine Radio)

Communicate clearly and safely on the water. Learn proper VHF procedures, calm voice technique, standard maritime phrases, and the right way to use Mayday, Pan-Pan, and Securité.

Radio Etiquette Call Structure Phonetic Alphabet Emergency Calls Weather Broadcasts
Important Safety Disclaimer

Informational only. Follow local regulations and official guidance. In an emergency, call 911 and/or hail VHF Channel 16.

The 80/20 of good radio communication

  • Think first: know what you’re going to say before you key the mic.
  • Short + specific: who you’re calling, who you are, where you are, what you need.
  • Speak slow and steady: clear beats loud every time.
  • One message at a time: don’t stack multiple requests in one long transmission.
  • Move off 16: use Channel 16 to make contact, then shift to a working channel.

Rule: If your transmission would take more than ~10 seconds, tighten it up or split it into two.

Proper call format (simple and repeatable)

Step-by-step call structure

  1. Who you’re calling (repeat 2–3 times)
  2. Who you are (your vessel name/call sign)
  3. Your position (GPS, landmark, or bearing/range)
  4. Your request (what you want and urgency)
  5. Over (end of your transmission)

Example: “Harbor Master, Harbor Master, Harbor Master — this is SONARK MARINE near Marker 12. Request dock instructions. Over.”

Voice control that actually helps (and what hurts)

  • Hold the mic 2–3 inches from your mouth (not pressed to your lips).
  • Talk across the mic slightly to reduce “popping.”
  • Speak in normal volume; yelling distorts audio.
  • Pause after keying up (1 second) so the first words aren’t clipped.
  • Use plain language; avoid filler and rambling.

Phonetic alphabet and numbers (so you don’t get misunderstood)

Use phonetics anytime there’s noise, weak signal, or critical info. For numbers, speak each digit clearly.

  • Phonetics: “Alpha, Bravo, Charlie…” (not made-up words)
  • Numbers: “One-six” (16), “Three-two” (32), “Zero” (0)
  • Positions: read slowly; repeat if asked

Tip: If you had to repeat it twice, switch to phonetics automatically.

Emergency priorities: Mayday vs Pan-Pan vs Securité

  • Mayday: grave and imminent danger (life-threatening)
  • Pan-Pan: urgent situation, not immediately life-threatening
  • Securité: safety information (hazard, weather, navigation)

Need the exact scripts and examples? See Mayday / Pan-Pan / Securité.

Weather broadcasts and listening discipline

  • Check NOAA weather before departure and again before return.
  • Don’t transmit over active traffic; wait for a break.
  • If conditions are changing, shorten your trip and keep an exit plan.

Related: Marine Weather & Forecasts (wind, waves/period, fog, warnings).