Under GMDSS, the reserve source of energy is not a battery (for example, a motor generator) the reserve source of energy must be tested at what minimum intervals？
A. Weekly
B. Annually, by a representative of the MSA
C. At the annual SOLAS inspection
D. Monthly
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Which of the following is true regarding the definition of the sea areas？
A. It is assured that INMARSAT services are available in sea area A3.
B. It is assured that INMARSAT services are available in sea area A1.
C. It is assured that INMARSAT services are available in sea area A2.
D. It is assured that INMARSAT services are available in sea area A4.
绝缘棒使用时，操作人员要戴绝缘手套、穿绝缘靴(鞋)。（）
触头间恢复电压是指电弧彻底熄灭后外电路加在触头间的电源电压。（）
GMDSS is required for which of the followings？
All vessels capable of international voyages
B. SOLAS Convention ships of 300 gross tonnage or more
C. Vessels operating outside of the range of VHF coastal radio stations
D. Coastal vessels of less than 300 gross tons
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