A.countries
B.states
C.names
D.groups
您可能感興趣的試卷
你可能感興趣的試題
A.one
B.two
C.three
D.four
A.a dummy antenna
B.a supporting facilities
C.a back-up equipment
D.an antenna
A.one-way
B.two-way
C.double-effect
D.one-effect
A.distress
B.urgent
C.safety
D.general
A.call sign
B.port of register
C.radio name
D.signal label
最新試題
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.
Please use（）for（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Before GMDSS, if the radio officer on board is serious ill,（）.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.