52.Every ship must be fitted with______SART,and______two-way VHF radio telephone A.1,2 B.2,3 C.2,1 D.3,2 选B

53.The transmission for entertainment purposes and unnecessary talking are______ A.not allowed B.sometimes allowed C.forbidden D.strictly forbidden 选B

54,In the GMDSS,MSI broadcast will be made on two dedicated systems: ______and______ A.NBDP/VHF radio

B.Inmarsat safetyNET/NAVTEX C.Safety service/Inmarsat-A D.Long range/shour fange 选B

55.NAVTEX Receivers also ues the B2 character to______different classes of messages A.identity B.reject C.print out D.correct 选A

56.The frequency 518KHz will be used to

transmit______and______warnings in NAVTEX A.navigational/typhoon B.traffic/meteorolrgical C.marine/hurricane

D.navigational/meteorological 选D

57.How many MF frequencies are available for DSC distress-related calls? A.One B.Two C.Four D.Five 选A

58.MCC is the abbreviation for ?_______? A. Corraction B. Certificate C. Control D. Calling 选C

59.Which of the following function that is not ? by INMARSAT-C A. distress alerting

B. store and forward messaging C. receipt of EGC messages D. telephone communication 选D

60.There are ____NCSs in total , one in each ocean region , the AOR(E and W ) IOR and POR

A. 3 B. 2 C. 1 D. 4 选D

61._______is the united nations agency responsible for the Radio Regulations among other things A. ITU B. IMO C. MSC D. WMO 选A

62. In areas covered by inmarsat HF can be used as an ______to satellite communication