单项选择题

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.relevant to
B.relate to
C.in response to
D.in relation to

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单项选择题

What’s the abbreviation for the World Meteorological Organization?（）

A.WMO
B.IHO
C.IMO
D.WARC

单项选择题

Geostationary satellites are the artificial satellites which（）.

A.always move slowly
B.are in one place only
C.sometime move sometime don‟t move
D.are synchronizing with the movement of the earth

单项选择题

What following is not among the functions of SOLAS ships?（）

A.receive shore-to-ship distress alerting
B.transmit ship-to-shore distress alerting
C.receive message for public correspondence
D.transmit and receive locating signals