A.A conditional or partial exemption may be granted，in exceptional circumstances，for a single voyage outside the sea area for which the vessel is equipped
B.Once a compulsory vessel's GMDSS station has been fitted and inspected，the station must be inspected only once every five years
C.All passenger vessels and all cargo vessels that are 300 Gross Tons or larger must comply
D.Compulsory vessels must carry at least two licensed GMDSS Radio Operators
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A.When the vessel is in an overloaded condition
B.When the vessel has arranged for both duplication of equipment AND shore-based maintenance
C.When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or logged
D.When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions
A.week
B.two weeks
C.month
D.two months
A.easy access to its storage compartment
B.replacement of the battery without exposure to the weather
C.it to float free if the vessel sinks
D.it to remain attached to the vessel
A.all required documents and publications may have to be produced
B.licensed GMDSS radio operators may be required to demonstrate equipment competencies
C.all required equipment must be fully operational
D.All of the above
A.manually activated and operate on maritime (VHF) channels
B.automatically activated and operate on maritime (VHF) channels
C.manually operated and detected by satellite
D.automatically operated and detected by satellite
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COSPAS-SARSAT is intended to be used for（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
The rescue coordination center may（）on stations which interfere with traffic.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
We consider（）send a helicopter with medical facilities to the distress area.
Before GMDSS, if the radio officer on board is serious ill,（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.