The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.<br>A:Mate's license<br>B:Restricted radiotelephone operator permit<br>C:Second-class radio operator's license<br>D:Seaman's document

The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
A:Mate's license
B:Restricted radiotelephone operator permit
C:Second-class radio operator's license
D:Seaman's document

出自：海船船员证

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