A reliable communication link is the key to realize airborne GPS data valid transmission.
可靠的通信链路是实现机载GPS信息有效传输的关键。
If communication link for math data exchange is needed have appropriate contacts been taken?
如果需要进行数模信息的交换，是否建立了相关的沟通渠道？
Data Link Communication Equipment Approved by USAF for Civil Air Traffic Control.
美国空军批准的民航空管数据链通讯设备。
Data Link Communication Equipment Approved by USAF for Civil Air Traffic Control.
美国空军批准的民航空管数据链通讯设备。
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