The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called（）.

单项选择题The Emergency Position Indicating Radiobeacon on a cargo vessel must be stowed（）.

A.in an inside passageway
B.in an approved bracket
C.so that it is accessible from the bridge of the vessel
D.so that it will float free if the vessel sinks

单项选择题The difference between a class A and a class B EPIRB is that the class A EPIRB（）.

A.operates on both military and civilian aircraft distress frequencies
B.transmits both an alerting signal and a homing signal
C.must be the float free type and automatically activated
D.operates with a greater output of signal power

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

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