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It isn't mandatory. It'll be mandatory by 2020, but for now, these planes need to broadcast ADS-B. http://en.wikipedia.org/wiki/Automatic_dependent_surveillanc
by nickodell 11y ago
It isn't mandatory. It'll be mandatory by 2020, but for now, these planes need to broadcast ADS-B.
http://en.wikipedia.org/wiki/Automatic_dependent_surveillance_%E2%80%93_broadcast http://en.wikipedia.org/wiki/Automatic_dependent_surveillanc...