A.dedicated system
B.MSI broadcasts
C.518KHZ
D.channel 16
您可能感興趣的試卷
你可能感興趣的試題
A.ship’s movement
B.safety
C.ship’s management
D.hazards
A.by day or at night
B.almost round the clock
C.somewhat and sometime
D.from sunrise and sunset
A.DF
B.Radar System
C.DSC System
D.COSPAS-SARSAT
A.nature of distress
B.type of assistance required
C.course and speed and time at which the information was recorded
D.A, B, C are all right
A.when two stations communicate with each other
B.in any radio system and at any time
C.when one ship sends a message to another station
D.for communication among some stations
最新試題
Before GMDSS, if the radio officer on board is serious ill,（）.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
COSPAS-SARSAT is intended to be used for（）.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.
The priority of EGC messages is classified by（）.
The advantage of geostationary satellites is（）.