求两个数中的最大数(1)maxVal(a,b):(2) a(3)b(4)a(5)b
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Which of the following frequencies have not been designated for on-scene communications in the Global Maritime Distress and Safety System?
A. VHF-Channel 16 on 156.8MHz
B. MF radiotelephony on 2182kHz
C. NBDP on 2182.0kHz
D. VHF-Channel 16 on 156.8MHz and MF radiotelephony on 2182kHz
How is ship to shore transmission of a distress priority message in most SESs initiated?
A. By provision of a distress button，，.
By including the priority code in the preamble of the Telex message.
C. By including the priority code in the dialed number in voice communications.
D. By initial voice contact with the Rescue Coordination Center
Information is grouped by subject on NAVTEX broadcast and each subject group is allocated a _________ B2.
A. transmitter identification
B. message numbering
C. subject indicator character
D. ZCZC format
What information does NAVTEX system broadcast?
A. High seas navigation warnings
B. Coastal navigation warnings
C. Ship position report
D. FleetNET information
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