Are the ship's main radio transmitter aerials earthed and radars switched off?

液货船上主无线电发射机天线已接地且雷达已关掉？

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By the middle of the nineteen-twenties, there were two main radio networks in the United States.

VOA: special.2010.01.31

The main radio transmitter for Carmarthenshire also has power problems leaving over 300, 000 people without services.

BBC: Wales snow: Schools, roads and airport closed

Local radio stations will offer commentary on qualifying games, with the semi-finals to be broadcast on 5 Live Sports Extra and the final on the main Radio 5 Live network.

BBC: Crash bang cricket nets sponsors

The UGCCS two main radio courses are Broadcast Reporting and Writing at the basic level for Diploma students, and Advanced Broadcast Production for students in their final year of the degree programme.

UNESCO: MEDIA SERVICES