When operating in coastal waters sea area A1), a GMDSS-equipped vessel must_____.
选项:
A:maintain a continuous DSC watch on 8,514. 5 kHz
B:maintain a continuous aural watch on 2, 182 kHz
C:maintain a continuous DSC watch on VHF Channel 16
D:maintain a continuous DSC watch on VHIF Channel 70
发布时间:2024-06-04 10:08:05