單項(xiàng)選擇題The frequency 156.525MHZ and 156.8MHZ should be used in the band of（）.
A.MF
B.VHF
C.HF
D.LF
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1.單項(xiàng)選擇題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
2.單項(xiàng)選擇題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
最新試題
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
題型：?jiǎn)雾?xiàng)選擇題
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
題型：?jiǎn)雾?xiàng)選擇題
By using（）system a ship can send a distress message and know with certainty it will be received.
題型：?jiǎn)雾?xiàng)選擇題
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
題型：?jiǎn)雾?xiàng)選擇題
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
題型：?jiǎn)雾?xiàng)選擇題