. Which of the following is true'?
A: . a compulsory VHF-DSC radiotelephone installation must be daily tested without radiation.
B: a compulsory VHF-DSC radiotelephone installation must be annually tested without radiation
C: a compulsory VHF-DSC radiotelephone installation must be monthly tested without radiation.
D: a compulsory VHF-DSC radiotelephone installation must be weeklv tested without radiation.
A: . a compulsory VHF-DSC radiotelephone installation must be daily tested without radiation.
B: a compulsory VHF-DSC radiotelephone installation must be annually tested without radiation
C: a compulsory VHF-DSC radiotelephone installation must be monthly tested without radiation.
D: a compulsory VHF-DSC radiotelephone installation must be weeklv tested without radiation.
举一反三
- 船对船报警应该使用（）。 A: Inmarsat-F船站 B: VHF DSC和MF DSC C: SART及VHF DSC D: 卫星EPIRB和VHF EPIRB
- A new theory ______ before it can be put into practice. A: must be tested B: be tested C: can be tested D: to be tested
- 智慧职教: 应 对VHF DSC和MF/HF DSC设备进行自检， 要试验两部VHF DSC对叫。
- 船至船遇险报警应该使用( )。 A: Inmarsat-F或Inmarsat-C船站 B: VHF DSC和MF DSC C: SART 及VHF DSC D: 卫星 EPIRB和 VHF EPIRB
- VHF 系统的双值守是指_____。 (130751:第9章 VHF与VHF-DSC设备) (A-0,B-0,C-0,D-0,错误-0) A: CH70 值守机和VHF CH16 的双值守 B: CH70 值守机和VHF DSC 的双值守 C: 16 和任一非16 信道的双值守 D