Humminbird DC 25 - Manual (Page 11)

Note: If you receive a distress message and are sure the caller is not in your vicinity, wait a short
time for others to acknowledge the call.
Placing an Emergency Call
To place an emergency call, press the CH 16 button to select Channel 16 (emergency and
calling channel).
Depress the microphone button and broadcast your emergency call. Speaking into the
microphone clearly and at a normal voice level, say “Mayday-Mayday-Mayday.” Then give your
call sign; if you have no call sign, identify yourself by vessel name and license name. State your
location, including any landmarks or navigational aids. State the nature of your emergency (such
as injuries or the condition of your craft), and identify the assistance you need.
Finally, state that you will remain on Channel 16, repeat your craft name and call sign, and say
“Over.”
Release the microphone button and wait for a response. If none is received shortly, depress the
microphone button again and resume the emergency call.