Ham Radio for Scuba Divers: Communication Above and Below Water

Below the Surface, Radio Cannot Reach You — Above, It Saves Lives

Radio waves do not travel through water. That is a fact scuba divers must respect. But the dive boat is where radios shine: coordinating dive sites, tracking divers on the surface, and calling for help in emergencies.

How Dive Boats Use Ham Radio

  • Surface coordination: The boat crew stays in touch while divers are below
  • Emergency response: If a diver surfaces in distress, the crew calls for help instantly
  • Weather: NOAA marine forecasts before and during the trip
  • Multi-boat trips: Dive groups spread across multiple boats stay coordinated

Dive Boat Radio Setup

Item Purpose
UV-K1(8) in dry bag Boat crew primary radio
External antenna Mounted on the dive boat cabin
Float strap If it goes overboard, it floats

Important Safety Note

Never rely on radio for underwater communication. Divers use hand signals and slate boards below the surface. Ham radio is for surface and boat coordination only.

UV-K1(8) for your dive boat →

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