Five years ago, in the immediate aftermath of the Indian Ocean Tsunami, amateur radio helped revive emergency communications with some of the worst affected locations. The decades old practice was hailed as the 'low tech' miracle that literally helped save lives. Where electricity and telephone services -- both fixed and mobile -- had been knocked down, amateur radio enthusiasts (or 'radio hams') restored the first communication links. They were at the forefront of relief efforts, for example, in the Andaman and Nicobar Islands in India, and in Hambantota in southern Sri Lanka. When all else fails, shortwave persists...
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