A、MAYDAY
B、PAN-PAN
C、SECURITE
D、SOS
更多“Messages concerning weather conditions transmitted by radiotelephone are preceded by（）.”相关的问题
A、concerning the Safety of Life at Sea (SOLAS) B、detailing important navigational warnings C、containing information concerning the safety of a mobile unit or person D、concerning on-scene communications
A、发现消息（Discover messages） B、保持消息（Keeplive messages） C、通告消息（Advertisement messages） D、通知消息（Notification messages）
A、show system boot-messages B、show chassis messages C、show file system boot-messages D、show boot-log messages
A、A. show system boot-messages B、B. show chassis messages C、C. show file system boot-messages D、D. show boot-log messages
A、There cannot be a radiotelephone located anywhere except in the wheelhouse B、The officer in charge of the wheelhouse is considered to have the radiotelephone watch C、Only distress messages may be transmitted over channel 13 D、Only the Master of the vessel is allowed to speak over the radiotelephone
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