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Distress Signal
Range
Calculator
Compare effectiveness and range of various marine distress signal types
Input Parameters
Signal Type
VHF Ch 16 Mayday
EPIRB/PLB
Aerial Flare
Signal Mirror
DSC Distress Button
Antenna Height (ft)
Weather
Clear
Overcast
Storm
Time of Day
Daytime
Nighttime
Calculate
Results
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Detection Range
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Est. Response Time
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Reliability
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Recommendation
Reference
Distress signal priority: 1. VHF Ch 16 MAYDAY (immediate, local) 2. DSC distress button (automated with GPS) 3. EPIRB/PLB (global, satellite) 4. Aerial flares (visual, 25nm+ at night) 5. Signal mirror (50nm+ in clear conditions)