单项选择题
The frequency 156.525MHZ and 156.8MHZ should be used in the band of().
A.MF
B.VHF
C.HF
D.LF
点击查看答案&解析
相关考题
-
单项选择题
Actually, the date for entry into effect will be 1st February().Though the text does not tell us about it.
A.1995
B.1998
C.1999
D.2000 -
单项选择题
The()is that search and rescue authorities ashore, as well as shipping in the immediate vicinity of the ship in distress, will be rapidly alerted to a distress incident so they can assist in a coordinated SAR operation with the minimun delay.
A.common communication system
B.distress traffic system
C.basic concept of GMDSS
D.SAR operation procedure -
单项选择题
()communication are intership VHF radio telephone communication.
A.ship-to-shore
B.shore-to –ship
C.bridge-to-bridge
