In inmarsat-A, “Priority 3” means_________communication
A. routine
B. distress
C. urgency
D. safety
查看答案
COSPAS-SARSAT cannot fulfill the function of
A. determining the position of a distress vessel
B. both a and c
C. distress communication
D. distress alerting and position fixing in Area A4
It is quite ______for an SES operator to send a distress alert.
A. easy and expensive
B. simple and certain
C. dangerous and stable
D. simple and certainly
It is possible for ships to receive safety message transmitted by Navtex station______
A. in any INMARSAT regions
B. n each NAVTEX area
C. at any distance
D. in Areas A3 and A4
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