which of the following frequencies has been designated for on-scene communications in the Global Maritime Distress and Safety System?
发布于 2021-04-18 18:44:46
【单选题】 A VHF FM ch 16 on 156.6kHz B HF radiotelephony on 2182kHz C NBDP on 2175.4kHz, VHF-FM Ch 16 on 156.6MHz D VHF-Ch 16 on 156.8MHz,NBDP on 2174.5kHz
