Step 3: Know the Warning Signal and have a Battery-Powered Radio
The ATTACK WARNING Signal — A wailing (undulating) tone on the sirens of three to five minutes duration or short blasts on horns or other devices repeated as necessary means:
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An attack on North America has been detected;
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Warning of fallout.
WHEN YOU HEAR THE WARNING SIGNAL, YOU SHOULD TAKE PROTECTIVE ACTION AND LISTEN TO THE RADIO FOR INSTRUCTIONS.
A Radio is Essential
When the Attack Warning sounds, you must take protective action. Take a battery-powered radio with you. Broadcast advice and instruction may help to save your life. If you don’t have a portable radio, turn up the volume of your house radio so that it can be heard in your shelter. If away from home you are forced to take emergency shelter and are near a radio-equipped vehicle, turn up the volume and open all the vehicle’s doors or windows.
The Canadian Emergency Broadcasting System, a network of all Canadian radio and television stations which will be formed when a nuclear attack on Canada has been detected, will tell you when and how to take emergency protective action against possible attack and shelter against fallout if an attack occurs.
Excerpt from 11 Steps to Survival published by Emergency Planning Canada, 1961
