What is the minimum operation time of reserve source of energy on ships with an emergency
A. 1 hour
B. 6 hours
C. 12 hours
D. 24 hours
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Which of the following documents are required by GMDSS for vessels on international voyages？
A copy of the IMO master plan of shore-based facilities
B. Station logs
C. ITU Radio Regulations
D. All of these
Which radio equipment is not necessary for the ships sailing in the sea area A1？
A. NAVTES receiver
B. VHF EPIRB
C. 406MHz EPIRB
D. VHF DSC
What equipment can be used to receive Maritime Safety Information？
A. HF NBDP
B. NAVTES
C. EGC receiver
D. All of these
单位工程质量验收评定由()组织
A. 监理单位
B. 建设单位
C. 总包单位
D. 施工单位
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