单项选择题
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
（）are used for distress alerting as a rule.A.SES/DSC/EP...
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
Mariners can use DSC for（）.A.general communicationB.dis...
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
Equipment requirement vary according to（）.A.Ship owners...
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
