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GPS Disconnected

Cobra Marine VHF Radio

Severity: Minor

Source: OnlyErrorCodes.com — Every error code. One place.

Cobra Marine VHF GPS Disconnected — Fix Guide

What Does This Error Mean?

'GPS Disconnected' on Cobra VHF means the radio has lost GPS feed — internal antenna not getting signal, or external NMEA source disconnected.
DSC distress will still go out but without coordinates.
Move to clear sky view if internal GPS, or check NMEA wiring if external.
Most events resolve once obstructions clear or NMEA reconnects.

Affected Models

  • Cobra MR HH-series
  • Cobra F77
  • Cobra F57
  • Cobra MR HH600

Common Causes

  • Internal antenna obstructed by metal
  • External GPS antenna cable damaged
  • NMEA source offline (chartplotter off)
  • Cold start period after long unused
  • GPS receiver failed (rare)

How to Fix It

  1. Check GPS source setting.

    Menu → GPS → Source.
    Determines if using internal or external GPS.
    Fix path depends on source.
    Most fixed-mount Cobra radios use external NMEA from chartplotter.
    Handhelds use internal.

  2. For internal GPS: clear sky view.

    Move radio (handheld) outside or clear sky view.
    Bridges, T-tops, hardtops block GPS signal.
    Wait 2-3 minutes for re-acquisition.
    Cold start may take 5-10 minutes — patience required.

  3. For external NMEA: check chartplotter.

    Confirm chartplotter has GPS lock.
    Check NMEA cable from chartplotter to radio.
    Loose connections at the radio cause disconnections.
    Push connectors firmly into sockets.

  4. Inspect NMEA wiring.

    Trace NMEA wires from chartplotter to radio.
    Look for damaged or disconnected wires.
    Crimp connections corrode in marine environments.
    Replace damaged wiring or re-crimp connections.

  5. Power-cycle the radio.

    Power off 30 seconds.
    Power back on.
    Wait for GPS reconnection.
    Internal GPS: 5-10 min cold start.
    External NMEA: 10-30 seconds once chartplotter has lock.

Frequently Asked Questions

Will distress still work without GPS?

DSC distress goes out but without your position.
Coast Guard sees MMSI but not coordinates — they ask via voice.
Significant safety degradation for offshore use.
Fix GPS feed before relying on the radio in emergencies.

Why does GPS drop on hot days?

Some Cobra radios have GPS sensitivity that degrades in extreme heat (over 40°C/104°F).
If your radio is in direct sun on a hot day, it may struggle.
Move to shade or open lower areas during peak heat.
This isn't a fault but a limitation of the GPS receiver design.