■ Safety -DSC communications on MF, HF and VHF

  ▶ Transmission of DSC Safety message

     

      Transmission of safety messages shall be carried out in two steps.

• announcement of the safety message
• transmission of the safety message

      The announcement is carried out by transmission of a DSC safety call on the DSC distress

      calling channel (4,6,8,12,16mHz on HF, 2187.5kHz on MF, Channel 70 on VHF)

      The safety message is transmitted on the distress and safety traffic channel in the same band
      in which the DSC call was sent, ie. 2182.0kHz on MF, Channel 16 on VHF

      The DSC safety call may be addressed to all ship(VHF only), ships in a specific geographical area
      (MF/HF only), or to a specific station.
      The frequency on which the safety message will be transmitted shall be included in the DSC urgency call

      The transmission of an urgency message is thus carried out as follows;

• tune the transmitter to the DSC distress calling channel(2187.5kHz on MF, Channel 70 on VHF)
• select the appropriate calling format on the DSC equipment(all ships(VHF only), geographic area(MF/HF only) or individual);
• transmit DSC safety call
• transmit the safety message as follows;

          - "SECURITE", repeated 3times

          - "ALL STATIONS" or called station, repeated 3times

          - "this is"

          - the 9-digit identity and the call sign or other identification of own ship

          - the text of the urgency message

 eg.:

          =PUSAN PORT AUTHORITY=  by VHF Channel 16 (In case Navigation warning)
            SECURITE, SECURITE, SECURITE, ALL STATIONS, ALL STATIONS, ALL STATIONS
            THIS IS BUSAN PORT AUTHORITY, BUSAN PORT AUTHORITY, NAVIGATION WARNING,
            CHANGE TO CHANNEL 13(ONE THREE) AND STANBY.

          = PUSAN PORT AUTHORITY=  by VHF Channel 13
             ALL STATIONS, ALL STATIONS, ALL STATIONS, THIS IS BUSAN PORT AUTHORITY, BUSAN PORT
             AUTHORITY, NAVIGATION WARNING.
             LEFT SIDE OF ENTRANCE BUOY IS OBSTRUCTED BY A SUNKEN VESSEL. A RED BUOY IS
             FASTENED TO THE OBSTRUCTION. ALL SHIPS NAVIGATE WITH GREAT CARE.
             BUSAN PORT AUTHORITY. OUT