Appendix to AI - External Communication Phrases

Standard GMDSS Messages

For further details see: ITU MANUAL for use by the Maritime Mobile and Maritime

Mobile-Satellite Services, Geneva.

Standard Distress Message

Structure

Upon receipt of a DSC Distress Alert acknowledgement the vessel in distress should

commence the distress traffic on one of the international distress traffic frequencies for

telephony (VHF Channel 16 or 2182 kHz) as follows:

MAYDAY

THIS IS

- the 9-digit Maritime Mobile Service Identity code (MMSI) plus name / call sign

or other identification of the vessel calling

- the position of the vessel

- the nature of distress

- the assistance required

- any other information which might facilitate rescue.

Example

MAYDAY

- THIS IS TWO-ONE-ONE-TWO-THREE-NINE-SIX-EIGHT-ZERO

MOTOR VESSEL "BIRTE" CALL SIGN DELTA ALPHA MIKE KILO

- POSITION SIX TWO DEGREES ONE ONE DECIMAL EIGHT

MINUTES NORTH

- ZERO ZERO SEVEN DEGREES FOUR FOUR MINUTES EAST

- I AM ON FIRE AFTER EXPLOSION

- I REQUIRE FIRE FIGHTING ASSISTANCE

- SMOKE NOT TOXIC OVER

Standard Urgency Message

Structure

After the transmission of a DSC Urgency Call switch the transmitter to VHF Channel 16 or

frequency 2182 kHz (if not automatically controlled) and commence the urgency traffic as

follows:

PAN-PAN (repeated three times)

ALL STATIONS (repeated three times)

THIS IS

- the 9-digit MMSI of the vessel plus name / call sign or other identification

- the position of the vessel

- the text of the urgency message.

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Example

PAN-PAN PAN-PAN PAN-PAN

ALL STATIONS ALL STATIONS ALL STATIONS

- THIS IS TWO-ONE-ONE-TWO-THREE-NINE-SIX-EIGHT-ZERO

MOTORVESSEL "BIRTE" CALL SIGN DELTA ALPHA MIKE KILO

- POSITION SIX TWO DEGREES ONE ONE DECIMAL EIGHT MINUTES NORTH

ZERO ZERO SEVEN DEGREES FOUR FOUR MINUTES EAST

- I HAVE PROBLEMS WITH ENGINE

- I REQUIRE TUG ASSISTANCE OVER

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