What is the basic concept of GMDSS?
A. Search and rescue authorities shore can be alerted to a distress situation
B. shipping in the immediate vicinity of a ship in distress will be rapidly alerted
C. Shore-side authorities and vessels can assist in a coordinated SAR operation with minimum delay
D. All of these
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下列所述的哪一个是无连接的传输层协议()。
A. tcp
B. udp
C. ip
D. spx
在事故的发生、发展过程中,两类危险源相互依存、相辅相成。第一类危险源出现的难易决定事故发生的可能性的大小;第二类危险源在事故发生时释放出的能量是导致人员伤害或财物损坏的能量主体,决定事故后果的严重程度。两类危险源共同决定危险源的危险性。()