EMERGENCY VHF CALLS

nb..TO BE USED WHEN BOAT OR PERSON(S) IN GRAVE AND IMMINENT DANGER

GMDSS DSC ALERT ON Ch70
(Global Maritime Distress Safety System - Digital Selective Calling)
  • Lift ditress button security flap on VHF radio - if no button fitted go straight to MAYDAY procedure.
  • Press Distress Button
  • Select Type of Distress
  • Hold Distress Button down for 5 seconds
  • Await acknowledgement for up to 15 seconds and then broadcast verbal MAYDAY on Ch16, whether or not your alert has been acknowledged


The Ch70 digital distress message will automatically repeat every 3½ - 4½ minutes. If the distress is over or falsely triggered, cancel it on the radio and broadcast an all ships message on Ch16 giving your craft's name, MMSI and state that you are cancelling the DSC alert, plus its date and time.

MAYDAY MESSAGE ON Ch16
  • Ensure your radio is switched on and at maximum volume without distortion.
  • Ensure you have set Ch16 and that dual watch has been turned off.
  • Ensure your radio is set for high output
  • Press to transmit and send...

    "MAYDAY MAYDAY MAYDAY this is
    Boatname Boatname Boatname

    MAYDAY
    Boatname

    POSITION - Lat/Long, distance and bearing from an obvious object or landmark. Repeat your position if you have time.

    PROBLEM - how many on board (include yourself), flares fired?, are you abandoning the boat

    ASSISTANCE - what assistance do you require"

  • If no reply keep trying

EXIT