I have listed particular 'distress' frequencies below for the attention of 'unlicensed AM MODE operators'. Please avoid the use of these frequencies, especially those in bold type.
Your signals might travel up to thousands of miles when long skip conditions prevail, and you could conceivably be preventing a 'distress' call from being received.
So, give the frequencies below a 'berth' of at least 5 kHZ if you are transmitting with 100 watts or less, and 10 kHZ if you are using kilowatts of output power.
The MF/HF DCS distress and calling frequencies are:
2187.5 kHz, 4207.5 kHz, 6312 kHz,
8414.5 kHz, 12577 kHz 16804.5 kHz
Telephony distress traffic is conducted on:
2181 kHz, 3023 kHz, 4125 kHz, 5680 kHz
6215 kHz, 8219 kHz 12290 kHz and 16420 kHz.
The Telex distress traffic uses:
2174.5 kHz, 4177.5 kHz, 6268 kHz,
8376.5 kHz, 12520 kHz and 16695 kHz.