单项选择题

On-scene communications will normally take place between（）.

A.ship in distress and assisting units
B.NCS and RCC
C.RCCs and „0n-scene commander‟ or “co-ordinator surface search”
D.ship in distress and coast station

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单项选择题

（）are used for distress alerting as a rule.

A.SES/DSC/EPIRB
B.SART/radiotelephone
C.COSPAS-SARSAT
D.both B and C

单项选择题

Mariners can use DSC for（）.

A.general communication
B.distress alerting and safety calling
C.receive MSI
D.both B and C

单项选择题

Equipment requirement vary according to（）.

A.Ship owner‟s will
B.economic condition
C.the area in which the ship operates
D.different orders of all countries