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An emergency locator transmitter's battery must be replaced after the ELT has been used for how long in total?

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  1. More than 24 cumulative hours
  2. More than 1 cumulative hour
  3. More than 10 cumulative minutes

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References

  1. 14 CFR 91.207 Emergency locator transmitters www.ecfr.gov/current/title-14/section-91.207 Checked 2026-10-09.

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