航海英語GMDSS單項(xiàng)選擇題每日一練(2019.01.08)

單項(xiàng)選擇題
International Navtex service is（）.
A.a terrestrial MF system
B.a satellite communication system
C.a land HF radio system
D.a coastal VHF system
單項(xiàng)選擇題
We（）the distress signal on our own radio before the shore station relayed it to us.
A.received alreadly
B.have received
C.had received
D.was receiving
單項(xiàng)選擇題
In INMASAT-A service code 32（）.
A.medical assistance
B.medical advise
C.maritime assistance
D.technical assistance
單項(xiàng)選擇題
There is actually an overlapped area of（）ocean regions somewhere in Western European Waters.
A.two
B.three
C.more than two
D.more than three
單項(xiàng)選擇題
The beacon located on board aircraft is termed（）.
A.EPIRB
B.PLB
C.ELT
D.MCC