1. Distress – Détresse

    1. Alert – Alerte DSC

      1. VHF ==> CH 70; MF ==> 2187.5 kHz; HF (OC) ==> 4207.5, 6312.0, 8414.5, 12577.0, 16804.5

      2. MMSI, position & time, Distress nature

      3. VHF ==> (Call & Message to reach max stations) MF ==> wait Distress ACK from coast station (2182 watch NOT obligatory) HF ==> wait Distress ACK from coast station (tampering with radio frequency ==> interrupts Alert!!)

    2. Call – Appel

      1. Mayday mayday mayday

      2. This is MYship MYship MYship

      3. HBY1234

      4. 235123456 (if DSC before)

    3. Message – Message

      1. Mayday

      2. MYship

      3. HBY1234

      4. 235123456 (if DSC before)

      5. Position & time

      6. Nature

      7. Assistance requested

      8. Additional information

      9. OVER

  2. Distress ACK

    1. DSC ==> ONLY by coast station!!

      1. (VHF, MF) Except if

        1. Requested by coast station OR

        2. NO ACK from coast station &

          1. No radio traffic from/to distress vessel &

          2. Alert > 5 mins & repeated

      2. HF ==> never from ship!!

    2. VHF, MF

      1. watch distress channel (16, 2182) & transcribe message

      2. NO ACK ≥ 5 min ==> transmit message to coast ==> ACK received mayday on 16, 2182

        1. Message

      3. Mayday

      4. Name OR MMSI OR other ID (distress vessel)

      5. This is MYship

      6. HBY1234

      7. 235123456 (if exists)

      8. Received Mayday

      9. Any other information

      10. OVER

    3. HF ==> NEVER distress ACK from ship

  3. Distress Alert Cancellation

    1. OFF/ON of radio station and/or CANCEL

      1. Message

    2. All Stations All Stations All Stations

    3. This is MYship MYship MYship

    4. HBY1234

    5. 235123456

    6. Please cancel my distress alert of xxxx UTC

    7. OVER

      1. Routine Message to Coast Station

    8. Call to Coast Station which sent ACK on watched public channel

    9. Explain reason for cancelation

  4. Distress Relay

    1. Distress Call Relay

    2. Distress Priority Message ==> Inmarsat

    3. DSC Distress Alert Relay ==> wait for GO AHEAD from coast station ==> distress call relay message header ONLY 1X!!

      1. Message

    4. Mayday Relay Mayday Relay Mayday Relay

    5. All Stations All Stations All Stations

    6. This is MYship MYship MYship

    7. HBY1234

    8. We received the following distress message at xxxx UTC on CH 16 / xxxx kHz

    9. Message as received

    10. OVER

  5. Urgency – Urgence

    1. Urgency All Stations

      1. PanPan PanPan PanPan

      2. All Stations All Stations All Stations

      3. This is MYship MYship MYship

      4. HBY1234

      5. 235123456 (if DSC call)

      6. Position & Time

      7. Problem

      8. Assistance required

      9. OVER

    2. Urgency Message Cancellation

      1. PanPan PanPan PanPan

      2. All Stations All Stations All Stations

      3. This is MYship MYship MYship

      4. HBY1234

      5. 235123456 (if DSC call)

      6. Please cancel Urgency Message of xxxx UTC

      7. OVER

    3. Urgency Message to Individual Station

      1. DSC ==> Urgency (OR Routine) to Individual Station

      2. Wait for ACK with working frequency

        Message

        1. IndividualStationName

        2. This is MYship

        3. HBY1234

        4. 235123456

        5. Problem & Assistance required

        6. OVER

      3. Without DSC

        Message

        1. PanPan PanPan PanPan

        2. IndividualStationName IndividualStationName IndividualStationName

        3. This is MYship MYship MYship

        4. HBY1234

        5. Assistance required

        6. OVER

  6. Safety – Sécurité

    1. Safety Message All Stations

      1. DSC ==> Safety to All Ships

        1. Message

      2. Securité Securité Securit

      3. All Stations All Stations All Stations

      4. This is MYship MYship MYship

      5. HBY1234

      6. 235123456 (if DSC call)

      7. Position & Time

      8. Problem

      9. Recommendation

      10. OVER

    2. Safety Message Individual Station

      1. DSC ==> Safety to Individual Station

        1. Safety Call

          1. Individual Station Name

          2. This is MYship

          3. HBY1234

          4. 235123456 (if DSC call)

          5. With a safety message

          6. OVER

          7. Wait ACK with working frequency

        2. Safety Message

          1. Individual Station Name

          2. This is MYship

          3. HBY1234

          4. 235123456

          5. Problem & Recommendation

          6. ) OVER

      2. No DSC ==> Individual Station

        1. Safety Call

          1. Securité Securité Securité

          2. Station Name Station Name Station Name

          3. This is MYship MYship MYship

          4. HBY1234

          5. With a Safety Message

          6. OVER

          7. Wait ACK with working frequency

        2. Safety Message

          1. Individual Station Name

          2. This is MYship

          3. HBY1234

          4. 235123456

          5. Problem & Recommendation

          6. OVER