选C

11.Which are the preferred frequencies in radiotelephony for on scene communications?

A.121.5MHz and 2174.5KHz

B. Ch 70(156.525MHz)and 2174.5KHz C. Ch 11(156.650MHz)and 2021KHz D. Ch 16(156.800MHz)and 2182KHz 选D

12.The chapter IV of SOLAS Convention is about ___________. A.maritime radio-communications B.navigational reguiations C.terms and definitions D.GMDSS instructions 选A

13.SOLAS vessels should be able to communicate with shore station_____

A.no matter where they are and what time it is B.at scheduled time and in major ocean regions C.at fixed time and position D.when they get permission 选A

14.SOLAS ships should keep a continuous listening winch on _____(原题单词错winch) A.CH 16 B.2182KHz C.121.5MHz D.Ch 70 选A

15.SOLAS vessels fitted with a maritime VHF installation should maintain watch on_____ A. channel 13 B. channel 70 C. channel 8 D. 2182KHz 选B 16.

MSI

is

received

by

ships

on

a

designsted

channel,”designsted”meams_______(原题单词错designsted) A. allocated B. appointed C, designed D. specialized 选B

17.What means are used to prevent the reception of unwanted broadcasts by vessels utilizing the NAVTEX system? A.Operating the receiver only during daytime hours B.Programming the receiver to reject unwanted broadcasts C.Coordinating reception with published broadcast schedules D.Automatic receiver de-sensitization during night hours 选B

18.______is a maritime mobile service in or near a port between coast stations and ship stations or between ship stations,in which messages are restricted to those relating to the opersons,It does not include public correspondence A.Distress Traffic B.Medical Advice

C.Emergency communication D.port Operations service

选D

19.What shall be transmitted to avoid all ships in large sea area being alerted? A.area call B.distress call C.urgency call D.DSC call 选A

20.In addition to meeting the requirement of Sea area A1 and A2,every ship engaged on voyage in Sea area A4 shall be provided with______ A.MF radio installation with DSC B.SES

C.MF/HF radio installation with DSC D.2187.5KHz watch receiver