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Emergency Messages
and Distress Procedure
13
“Mayday — Mayday — Mayday”
“This is Corsair — Corsair — Corsair” [or “IL 1234 AB”], repeated three (3) times.
“Mayday Corsair (or IL 1234 AB)”
“Navy Pier bears 220 degrees magnetic — distance 5 miles”
“Struck submerged object and flooding — need pump and tow”
“Four adults, three children aboard — no one injured”
“Estimate we will remain afloat one-half hour”
“Corsair (or IL 1234 AB) is 26 ft sloop with blue hull and tan deck house”
“I will be listening on Channel 16”
“This is Corsair (or IL 1234 AB)”
“Over”
It is a good idea to write out a script of the message form and post it where you
and others on your vessel can see it when an emergency message needs to be sent.
Marine Distress Procedure – DSC
•
Digital Selective Calling (DSC) is a semi-automated system that will allow you to
press the Distress button from any routine to make a distress call. When the
distress button is pressed, all other channels go to Standby mode and allow the
digitally encoded “pre-programmed” message to take precedence. Important
information such as your MMSI number, position and name will be transmitted on
Channel 16. The distress alarm will sound for two (2) minutes or until the alarm is
cleared.
The DSC system allows you to choose a “pre-programmed” distress call such as:
“Man Overboard, Sinking, Collision.” There are many pre-programmed choices to
choose from. If a GPS is connected to your radio, your coordinates will also be sent
to the Coast Guard as well as to other vessels that are within range of the
transmission. DSC calling also allows the user to initiate and receive distress,
urgent, safety, routine, position request, position send and group calls between
vessels equipped with DSC capable radios.
WARNING
This radio will generate a digital maritime distress and safety signal to help
facilitate search and rescue. This radio must be used only within
communication range of a shore based VHF station with a distress and safety
watch system. The range of the signal may vary, however, under normal
conditions should be approximately 20 nautical miles.
VHF Marine Radio Protocols
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