A.are capable of following / distance
B.can follow / altitude
C.can hardly follow / shape
D.are unable following / angle
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A.quick and good
B.convenient and certain
C.easily and simply
D.important and difficult
A.living standards
B.survival condition
C.chance of survival
D.technical specification
A.they all have different limitations with respect to coverage
B.they all have different limitations in the technology they use
C.different systems apply to different ships
D.all of above
A.Inmarsat-A
B.Inmarsat-B
C.Inmarsat-C
D.Inmarsat-F
A.Search and rescue authorities ashore will rapidly received an distress alert and acted upon
B.SAR units will be rapidly alerted to a distress incident and assist in a coordinated SAR operation
C.Ships navigating in the immediate vicinity of the ship in distress will rapidly alerted to the alert and give their help accordingly
D.The RCC will rapidly alerted to a distress alert through satellite and terrestrial communication techniques and conducted a rescue operation immediately
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If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
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.
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.
The priority of EGC messages is classified by（）.
Ship-to-ship distress alerting should be conducted by（）.
International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.
The advantage of geostationary satellites is（）.
All coast radio stations（）DSC installed for VHF and HF.