It's to save the life of people who have been caught up in the natural disaster. The communication is to let other people to know that the victims are in danger and need help from some rescue team or something like that. The victims might need supplies to survive that disaster. The victims might broadcast their message to get other peoples' attention to let them know about their current situation. The same way rescue teams might be at that disaster site broadcasting their message to know whether anybody needs help or not. Communication can also be used before a natural disaster telling everybody to evacuate from that area so people can evacuate OR collect supplies to survive that disaster. People might need mobile phones and/or telephones and internet to communicate long distance. Even cameras might come in handy. A victim might take a picture of their location and send it over via internet so a rescue team can know where they currently are.
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