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单选题
Distress signals may be（）.
A
red flares
B
smoke signals
C
sound signals
D
Any of the above
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单选题If no distress acknowledgement is received（）a DSC distress call transmission, then the ship in distress may repeat the DSC distress call attempt after a delay of between 3.5 and 4.5 minutes from the beginning of the initial call.A
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单选题Distress flares and smoke signals for small passenger vessels（）.A
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must be marked with an expiration date not more than 42 months from the date of manufactureD
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单选题Why should the SES operators be very careful when the ship enters the area where three ocean regions overlap? Because（）.A
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单选题All of the following are distress signals under the Rules EXCEPT（）.A
International Code Signal AAB
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单选题All of the following are recognized distress signals under the Navigation Rules EXCEPT（）.A
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单选题The service life of distress signals must be not more than（）.A
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单选题On every vessel，distress signals must be stowed（）.A
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above the freeboard deck away from heatD
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单选题The regulations require that inspected vessels on an international voyage，other than small passenger vessels，must carry which of the following distress signals on or near the navigating bridge?（）A
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metC
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the weather over there is always terribleB
the condition there is complicatedC
the signals are too strongD
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