现在海上通信系统主要有卫星通信、单边带、甚高频(VHF)。

Now maritime communications systems primarily include satellite communications, single side band, VHF (VHF).

youdao

现在海上通信系统主要有卫星通信、单边带、甚高频(VHF)。

Now maritime communications systems primarily include satellite communications, single side band, VHF (VHF).

youdao