单项选择题
A.on the bridge B.in the coast station C.on the forecastle D.on starboard side
Ships at sea are in urgent need of MSI because they are...
单项选择题Ships at sea are in urgent need of MSI because they are()various kinds of danger.
A.subject for B.liable to C.easy to meet D.always encounter
In the GMDSS, MSI broadcasts will be made on two dedica...
单项选择题In the GMDSS, MSI broadcasts will be made on two dedicated systems:()and().
A.NBDP/VHF radio B.Inmarsat safetyNet/NAVTEX C.Safety service / Inmarsat-A D.Long range / short range
International SafetyNet and Navtex Services promulgate ...
单项选择题International SafetyNet and Navtex Services promulgate MSI by means of().
A.FEC and ARQ B.satellite and terrestrial communications C.radio and telex D.NBDP