SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/boat-cell-phone-limits

Why isn't a cell phone a substitute for a VHF marine radio in an emergency?

A call reaches one person, not the boats nearby who could help fastest.

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  1. Phones can't call 911 from the water
  2. A call reaches one person, not nearby boats ✔
  3. Phones are illegal to use on boats

Why: A cell phone works only where there's service, and calling one person skips the Good Samaritans nearby who could reach you first. Cold water also drains the battery fast. A VHF call on channel 16 reaches every boat listening.

Huh, didn't know that: The Coast Guard says cell phones can still be an added measure of safety on board.

The dad joke
My phone and I broke up on the boat. Bad reception.
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References

Answer: A call reaches one person, not nearby boats. A cell phone works only where there's service, and calling one person skips the Good Samaritans nearby who could reach you first. Cold water also drains the battery fast. A VHF call on channel 16 reaches every boat listening.

  1. USCG NAVCEN, Cellular Telephones on Boats www.navcen.uscg.gov/cell-telephones-on-boats
    If you make a distress call on a cellular phone, only the one party you call will be able to hear you.
    Checked 2026-10-09.

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