Shelter CommunicationsOutside information is critical for your survival in a disaster. Plan to have several forms of communication. We suggest that you purchase a good short wave radio, CB radio, and if possible, an amateur radio in the 40 to 80 meter band area. CBs are useful at short distances and are 'line of site', only; but they will provide local information, which may be very important. The usefulness of two -meter radios is limited after a nuclear attack, because the EMP will destroy relay stations needed for two-meter transmission and reception, even though the radio itself, may have survived the event. Two meter radios, though much more expensive than CBs, will have the same resulting range. Amateur radios in the 40 to 80 meter range, on the other hand, will continue to function (if protected during the actual EMP event) because relay stations are not needed for their use.
We highly encourage at least one of the people assigned to your shelter, to become a licensed amateur radio operator. Form nets using similar maps, and practice disaster scenarios.
Though protected, radios may not function for a few hours to days because of disturbances in the ionosphere. After two full days, turn on and listen to your radio for short periods of time. It is psychology imperative that you have outside contact. Plan to use your CB or ham radio sparingly, as transmitting on these radios requires a great deal more power than when they are in the 'receiving' mode. If others that you know have shelters, plan to use the same frequencies.