What is the basic concept of GMDSS? （）<br>A:Search and rescue authorities ashore can be alerted to a distress situation<br>B:Shipping in the immediate vicinity of a ship in distress will be rapidly alerted<br>C:Shoreside authorities and vessels can assist in a coordinated SAR operation with minimum delay<br>D:All of the above

What is the basic concept of GMDSS? （）
A:Search and rescue authorities ashore can be alerted to a distress situation
B:Shipping in the immediate vicinity of a ship in distress will be rapidly alerted
C:Shoreside authorities and vessels can assist in a coordinated SAR operation with minimum delay
D:All of the above

出自：海船船员证

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