單項選擇題DSC distress relays can be transmitted by either()or().

A.a coast station/a ship station
B.an EPIRB/a SART
C.ARQ/FEC
D.a back-up satellite/a land SAR unit


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1.單項選擇題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

2.單項選擇題()are used for distress alerting as a rule.

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