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
内容
- 0
VHF-DSC 采用的工作频率是_____。 (130740:第9章 VHF与VHF-DSC设备) (A-0,B-0,C-0,D-0,错误-0)
- 1
Which of the followings is not true? A: A compulsory vessel must satisfy certain equipment carriage requirements that are determined by where thevessel sails. B: A compulsory vessel must carry licensed GMDSS operators. the number should be determined by theassociated administration. C: A compulsory vessel must be able to transmit and respond to distress alerts . D: GMDSS operators should be a qualified deck officer first.
- 2
GMDSS要求船舶必须配备（）. A: DSC和SES B: SART、TWO-WAY VHF和EPIRB C: SART、EPIRB和518NAVTEX D: SART、TWO-WAY VHF、EPIRB和518NAVTEX，VHF DSC
- 3
Which of the following equipment can DSC terminal equipment connect with'? A: NBDP B: NAVTEX C: VHF transceiver D: SART
- 4
对DSC设备进行测试时，（）DSC设备不允许测试。 A: 中频 B: VHF C: 高频 D: 2187.5kHZ