Carriage of 8.33 kHz radio equipment above 19,500 ft. in the ICAO EUR Region will be mandatory as of March 15, 2007, Eurocontrol said. Implementation of 8.33 kHz channel spacing above FL195 is a response to the critical shortage of channels in the VHF aerial spectrum (118-137 MHz). Eurocontrol is recommending the strict enforcement of mandatory carriage in order to minimize the operational impact of handling non-8.33 kHz-equipped aircraft. From an aircraft retrofit perspective, the main ...

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