In which sea areas(s), INMARSAT service are available？
A. Sea Area A3 only
B. Sea Area A1, A2 and A3
C. Sea Area A3 is included
D. Excluding sea area A1
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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
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)。（）
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