Tärkeysjärjestyksessä hätäsanomasta seuraavana olevan pikasanoma on kiireellinen aluksen tai henkilön turvallisuutta koskeva viesti. Sitä käytetään, kun ei ole välitöntä vaaraa ja avun tarvetta tai avun tarve ei ole täysin perusteltu. Tämä viestiluokka ohittaa tärkeysjärjestyksessä kaikki muut paitsi hätäsanomat.

Joskus on vaikea määrittää onko tilanne vakava ja välitön vaiko vain kiireellinen. Esimerkiksi, jos aluksesi on rikkoutunut ja on ajelehtimassa 20 minuutin kuluttua karille, on kyseessä hätätilanne. Jos karille ajelehtiminen taas kestää 4 tuntia, on kyseessä kiirellinen tilanne.

Jos sinulla on kiirellinen henkilön terveyttä koskeva tilanne ja kaipaat lääkinnällisiä ohjeita, sinut voidaan yhdistää avustavaan lääkäriin rannikkoradioaseman kautta. Jos taas kaipaat henkilön evakuointia, rannikkovartiosto voi evakuoida evakuoinnin tarpeessa olevan.

Pikaliikenne koostuu pikasanomasta (ilmoituksesta) ja pikaviestistä. Pikasanoma on ensimmäinen puhe tai tekstiproseduuri. Hätäsanoma on DSC -viesti pikasanomaluokassa radioliikennetaajuuksilla tai välitettynä avaruusasemien kautta. Hätäviesti on sanoman jälkeen lähetetty puhe- tai tekstiviesti pikasanomaluokassa.

Pikaradioliikenteen proseduuri

Maanpäällisessä järjestelmässä pikaradioliikenne koostuu DSC-sanomasta ja puhepikaviestistä ja kapeataajuuskaistaisesta printatusta viestistä.


The announcement of the urgency message shall be made on one or more of the distress and safety calling frequencies specified in Table … using either digital selective calling and the urgency call format, or if not available, radio telephony procedures and the urgency signal.
A separate announcement need not be made if the urgency message is to be transmitted through the maritime mobile-satellite service.
Ship stations not equipped for digital selective calling procedures may announce an urgency call and message by transmitting the urgency signal by radiotelephony on the frequency 156.8 MHz (channel 16), while taking into account that other stations outside VHF range may not receive the announcement.
In the maritime mobile service, urgency communications may be addressed either to all stations or to a particular station. When using digital selective calling techniques, the urgency announcement shall indicate which frequency is to be used to send the subsequent message and, in the case of a message to all stations, shall use the “All Ships” format setting.

Urgency announcements (urgency call) may be addressed to all ships, to selected group of vessels, to the specific ships, or to vessels in a defined geographical area or to specific coast station. The frequency on which the urgency message will be transmitted after the announcement shall be indicated in the DSC urgency call.

The urgency call and message shall be transmitted on one or more of the distress and safety traffic frequencies specified in the table distress and safety frequencies.
However, in the maritime mobile service, the urgency message shall be transmitted on a working frequency:

  • in the case of a long message or a medical call; or
  • in areas of heavy traffic when the message is being repeated.

An indication to this effect shall be included in the urgency announcement or call.

In the maritime mobile-satellite service, a separate urgency announcement or call does not need to be made before sending the urgency message. However, if available, the appropriate network priority access settings should be used for sending the message.

The urgency call format and the urgency signal indicate that the calling station has a very urgent message to transmit concerning the safety of a mobile unit or a person.

Communications concerning medical advice may be preceded by the urgency signal. Mobile stations requiring medical advice may obtain it through any of the land stations shown in the List of Coast Stations and Special Service Stations.
Urgency communications to support search and rescue operations need not be preceded by the urgency signal.


PAN PAN, PAN PAN, PAN PAN

ALL STATIONS, ALL STATIONS, ALL STATIONS or
(Name of individual station spoken 3 times)

THIS IS (Name of the vessel spoken 3 times), (Call sign of the vessel), (MMSI of the vessel)

POSITION (Vessel's position)

(Reason for call, Assistance required, Number of people onboard, Information that could help rescue)

OVER
Pattern of an Urgency Call and Message

PAN PAN, PAN PAN, PAN PAN

ALL STATIONS, ALL STATIONS, ALL STATIONS

THIS IS Spinaker, Spinaker, Spinaker, call sign Sierra 5 Lima 1 2, 278054321

POSITION 450 36' North 0130 32' East

Medivac

Injured crewman requires medical evacuation

Steaming towards Trieste speed 6 knots

OVER
An example of an Urgency Call and Message

Transmission of an urgency announcement and message on MF frequencies

Announcement:
  • tune the DSC transmitter to the DSC distress calling channel (2187,5 kHz on MF);
  • in accordance with the DSC equipment manufacturer’s instructions, key in or select on the DSC equipment keyboard;
  • the format specifier (all ships call, group of ships, geographical area or individual station),
  • if appropriate, key the the 9-digital identity of specific station, group stations or geographical area (not required if the format specifier is “all ships”,
  • the category of the call (urgency),
  • the frequency or channel on which the urgency message will be transmitted,
  • the type of communication in which the urgency message will be given (radiotelephony or radiotelex), in accordance with the DSC equipment manufacturer’s instructions;
  • transmit the DSC urgency call.
After the DSC announcement, the urgency message will be transmitted on the frequency indicated in DSC call.

Transmission of urgency messages on MF should normally be addressed:
  • either to all ships within a specific geographical area,
  • or to a specific coast station.

Transmission of an urgency announcement and message on HF frequencies

Announcement:
  • choose the HF band considered to be the most appropriate, taking into account propagation characteristic for HF radio waves at the actual season and time of day; the 8 MHz band may in many cases be appropriate first choice;
  • tune the HF transmitter to the DSC distress channel in the chosen HF band;
  • key in or select call format for either geographical area call or individual call on the DSC equipment, as appropriate;
  • in case of area call, key in specification of the relevant geographical area;
  • follow the manufacturer instructions for keying in or selection of relevant information on the DSC equipment keyboard , including type of communication in which the urgency message will be transmitted (radiotelephony or radiotelex);
  • transmit the DSC call; and
  • if the DSC call is addressed to specific coast station, wait for DSC acknowledgement from the coast station. If acknowledgement is not received within a few minutes, repeat the DSC call on another HF frequency deemed appropriate.
Announcement and transmission of urgency messages addressed to all HF equipped ships within a specified area may be repeated on a number of HF bands as deemed appropriate in actual situation.

Transmission of urgency messages on HF should normally be addressed:
  • either to all ships within a specific geographical area,
  • or to a specific coast station.

Practice on MF/HF radio simulator

  1. If necessary, switch on by pressing the ON/OFF button.
  2. Press the Menu button.
  3. Choose DSC CALL from SELECT MENU by up and down softkeys.
  4. Press OK softkey when the selected bar DSC CALL is lighted.
  5. On the window named SELECT TYPE OF CALL choose AREA.
  6. Approve settings by OK softkey.
  7. On the window named SELECT CATEGORY choose URGENCY by the up and down softkey.
  8. Approve settings by OK softkey.
  9. On the window ENTER WORK FREQ you can change working frequency or accept default frequency.
  10. If you accept default frequency approve settings by OK softkey or if you want to program another working frequency press CHANGE softkey.
  11. If you selected CHANGE softkey enter working frequency by numerical keypad and accept by ENTER.
  12. Approve settings by OK softkey.
  13. On the next window named SELECT DSC FREQ you can select calling DSC frequency by CHANGE FREQ softkeys.
  14. Approve settings by OK softkey.
  15. On the last window you can check all parameters of the transmission.
  16. If you accept prepared transmission press SEND softkey.



Urgency Alert is transmitted to All Ships on DSC frequencies. Follow with voice communication on associated RT or telex frequencies commencing with the procedure word Pan Pan.

Reception of an Urgency Alert

Ships receiving a DSC urgency call announcing an urgency message addressed to all ships, shall NOT acknowledge receipt of the DSC urgency call, but should tune radiocommunication receiver (the radiotelephony or radiotelex, as appropriate) to the frequency (and communication mode) indicated in the DSC call, and receiving to the urgency message by the radiotelephony or radiotelex as appropriate for at least five minutes. If, at the end of the five-minute monitoring period, no urgency message has been received, a coast station should, if possible, be notified of the missing message. Thereafter, normal working may be resumed.
Coast and ship stations which are in communication on frequencies other than those used for the transmission of the urgency signal or the subsequent message may continue their normal work without interruption, provided that the urgency message is not addressed to them nor broadcast to all stations.

Cancellation of an Urgency Alert

When an urgency announcement or call and message was transmitted to more than one station and action is no longer required, an urgency cancellation should be sent by the station responsible for its transmission.

PAN PAN, PAN PAN, PAN PAN

ALL STATIONS, ALL STATIONS, ALL STATIONS or
(Name of individual station spoken 3 times)

THIS IS (Name of the vessel spoken 3 times), (Call sign of the vessel), (MMSI of the vessel)

PLEASE CANCEL URGENCY MESSAGE OF (Time in UTC)

OVER
Pattern of an Urgency Cancellation Call and Message

Last modified: Saturday, 25 April 2020, 7:50 PM