DSC distress relays can be transmitted by either（）or（）.
- Aa coast station/a ship station
- Ban EPIRB/a SART
- CARQ/FEC
- Da back-up satellite/a land SAR unit
问题
DSC distress relays can be transmitted
参考解析：
分类：GMDSS题库
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1、Which EPIRB transmits a distress alert
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Distress signals may be（）.Ared flaresBsmoke signalsCsound signalsDAny of the above
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3、If a DSC distress relay is transmitted
If a DSC distress relay is transmitted from coast station , it will（）.Aindicate the ship in distress that the alert has been receivedBalert ...
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6、In the GMDSS, distress alerting can be
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