A.secured inside the wheelhouse
B.tested annually
C.tested monthly
D.secured in the emergency locker
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A.NAVTEX
B.HYDROLANT/HYDROPAC
C.NAVAREA
D.SAFESEA
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
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
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
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
最新試題
The priority of EGC messages is classified by().
Radio communication()for many years and helps to save tens of thousands of lives.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of()tons gross tonnage and upwards but less than 500 tons gross tonnage.
SOLAS ships shall be equipped with().
COSPAS-SARSAT is intended to be used for().
Before GMDSS, if the radio officer on board is serious ill,().
The vessel has stayed in port for seven days because she needs().
All coast radio stations()DSC installed for VHF and HF.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous()alert.
The advantage of geostationary satellites is().