Trans Canada Microwave

Trans Canada Microwave or Trans-Canada Skyway was a microwave system built in the 1950s to carry telephone and TV from Canada's east coast to its west coast. Because microwaves travel in a straight line and do not follow the curvature of the Earth, towers were built every 48 kilometres. The towers ranged from nine metres high to over 100 metres high in northern Ontario. The system included 139 towers spanning over 6275 kilometres and cost $50 million ($336 million in 2003 dollars).

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