Designed for use in a variety of unmanned and manned aircraft, BACN is a forward-deployed airborne communications relay and network-centric enterprise information server.

BACN被设计用于各种无人和载人飞机，是一种前沿部署空中通信中继站和网络中心企业信息服务器。

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The relay box has long been checked by manual work. Its accuracy and efficiency can't meet the requirement of the modern aircraft.

飞机继电器盒长期以来一直采用人工方法进行检测，其检测精度和效率已不能满足现代飞机的使用要求。

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The Russians said a number of rebel vehicles, anti-aircraft installations and communication facilities and a relay transmitter were destroyed.

BBC: Row over Chechnya 'atrocities'

The ground control stations send their commands to Reaper via a fibre-optic link to a satellite relay station in Europe, which bounces them into space and back down to the aircraft.

BBC: Military's crucial 'eye in the sky'