(v) If someone onboard your vessel still manages to send a false
'Distress Alert' or false 'Distress Priority Message' using your
Inmarsat-C equipment, you must CANCEL that false alert!
message, by sending a 'Distress Priority Message' -to the MRCC- through the same LES as the false alert!message was sent, e.g.,
MAYDAY
jUSTINA/GJUS/423245678
49 22N 010 46W on AORE
CANCEL MY FALSE DISTRESS ALERT (or MESSAGE)
MASTER
2S/1200UTC
(Sending the cancellation message through the same LES ensures that it
arrives at the same MRCC as the false alert/message, with minimum delay)
Ship-to-Shore Distress Alerts, and voice (or telex) Distress Calls/
Messages - Example - using Marine SSB Radio and HF DSC
Action onboard Vessel in Distress- Send DSC Distress Alert on one of
the HF DSC Distress & Safety
frequencies (statingJ3E or Telex
for subsequent communications) - Send voice (or telex) Distress Calli
Message
Action in A3/A4 Coast Radio Station
Receive HF DSC Distress Alert
Send a DSC Acknowledgement
Set watch on the voiceltelex channel
'paired' with the alerting frequency
Acknowledge by voice {'Received
Mayday' or telex ('RRR SOS')
Author's explanation:
You should select an HF Distress & Safety alerting frequency suitabLe for
covering the distance between your position and a Coast Station (or stations)
keeping an HF DSC Distress Watch (your 'voyage communications plan' -
chapter 3 - should have identified any stations which cover your location). The
subsequent voice/telex Distress CaLl/Message should take the usuaL form, e.g:
Voice Distress Call/Message
' Mayday Mayday Mayday
this is justina,justina, justina
Mayday justinalGJUS1232456789
Position 49 5.5N 030 22W
Cargo shifted, capsize imminent
Require Immediate Assistance
25 Persons on Board
Wind SW force 8
Over'90 THE NAUTICAL INSTITUTE
Telex Distress MessageMAYDAY
jUSTINAlGJUSI232456789
49 55N 030 22W
CARGO SHIFTED CAPSIZE IMMINENT
RQIMMED ASSISTANCE
25POB
WINDSW8
+?