单项选择题
The Consol navigation system，used in Russian and Northern European waters，can be used（）.
A.for precise navigation in coastal waters
B.by measuring the phase difference of the dots and dashes
C.as an aid to ocean navigation
D.if the vessel is fitted with a special Consol receiver
相关考题
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单项选择题
The Class A EPIRB transmits a signal（）.
A.that follows the curvature of the earth
B.that can be picked up by SARSAT satellite
C.that activates an alarm on board nearby aircraft
D.to alert shore stations and then transmits a homing signal -
单项选择题
Survival craft EPIRBs (Class S) are（）.
A.permanently mounted in the survival craft
B.portable and stowed for carriage to the survival craft
C.permanently mounted on the bridge wings
D.portable and stowed in the emergency gear locker -
单项选择题
Proper GMDSS watchkeeping includes（）.
A.understanding the GMDSS console's normal operational indicators
B.maintaining a proper GMDSS radio station log
C.responding to and comprehending alarms
D.All of the above
