[单项选择]Which maintenance functions can a GMDSS Radio Operator perform（）.
A. The Operator can make fine internal adjustments to the transmitter as long as the output power does not change by more than one percent
B. The Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstacles
C. All levels of maintenance must be performed by a licensed GMDSS Radio Maintainer
D. The Operator may install an EPROM in order to ensure that the equipment continues to operate within legal constraints

[单项选择]Which statement concerning GMDSS Radio Operator requirements is FALSE（）.
A. Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at sea
B. Each compulsory vessel must carry at least two licensed Radio Operators at all times while at sea and may elect to carry a GMDSS Radio Maintainer as well
C. Communications involving safety of life at sea do not have to be logged as long as the compulsory vessel was not involved in such communications
D. While at sea，adjustments to，and the maintaining of，GMDSS equipment may be performed by the GMDSS Radio operator as long as the work is supervised by an onboard licensed GMDSS Radio Maintainer

[单项选择]If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）
A. The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator
B. The transmission is not initiated and "ERROR" is indicated on the display readout
C. The transmission will be made with "default" information provided automatically
D. The receiving station will poll the DSC unit of the vessel in distress to download the necessary information

[单项选择]What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （）
A. No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency
B. The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received
C. The Operator should immediately set continuous watch on VHF channel 70
D. The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received

[单项选择]How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）
A. 6 months
B. 1 year
C. 2 years
D. 3 years

[单项选择]Where should the GMDSS radio log be kept on board ship（）.
A. In the Captain's office
B. In the sea cabin
C. At the GMDSS operating position
D. Anywhere on board the vessel

[单项选择]When the GMDSS Radio Operator on watch hears“SECURITE”spoken three times he can expect to receive a message concerning（）.
A. The safety of navigation or important meteorological warnings
B. The safety of a vessel or a person is in jeopardy
C. A vessel in need of immediate assistance
D. A coast station traffic list

[单项选择]How long must the GMDSS radio log be retained on board（）.
A. At least two years after the last entry
B. At least one year after the last entry
C. At least 90 days after the last entry
D. At least 30 days after the last entry

[单项选择]With the help of GMDSS（）can be alerted to a distress incident as soon as possible.
A. all ships in a large sea area
B. only the sea authorities ashore
C. the SAR units ashore and at sea
D. the port radios and the coast stations

[单项选择]In the GMDSS, distress alerting can be transmitted in（）directions.
A. 1
B. 2
C. 3
D. 4

[单项选择]On which vessels is GMDSS required? （）
A. All vessels capable of international voyages
B. Vessels operating outside of the range of VHF coastal radio stations
C. SOLAS Convention ships of 300 gross tonnage or more
D. Coastal vessels of less than 300 gross tons

[单项选择]Before GMDSS, if the radio officer on board is serious ill,（）.
A. someone else will take his place
B. the captain will take charge of his work
C. nobody will be capable of doing his work
D. anyone else will use the radio equipment

[单项选择]According to the basic concept of GMDSS,（）can be rapidly alerted to a distress incident.
A. only SAR authorities on land
B. all ships in a very large sea area
C. the nearest coast stations and port radios
D. the SAR authorities ashore as well as ships in the vicinity of the casualty

[单项选择]Radio beacon can be activated（）in case of distress.
A. only automatically
B. only manually
C. both automatically and manually
D. only by remote control

[单项选择]For GMDSS，which statement concerning a compulsory vessel is FALSE?（）
A. A conditional or partial exemption may be granted，in exceptional circumstances，for a single voyage outside the sea area for which the vessel is equipped
B. Once a compulsory vessel's GMDSS station has been fitted and inspected，the station must be inspected only once every five years
C. All passenger vessels and all cargo vessels that are 300 Gross Tons or larger must comply
D. Compulsory vessels must carry at least two licensed GMDSS Radio Operators

[单项选择]Which device provides the main means in the GMDSS for locating ships in distress or their survival craft（）.
A. Radio direction finder
B. Satellite EPIRBs
C. MF/HF DSC
D. VHF homing device

[单项选择]Which statement about radio navigational warnings is TRUE（）.
A. The topics for warnings included in HYDROLANTS，HYDROPACS，and NAVAREA warnings are the same
B. NAVAREA warnings concern only coastal navigation and inland navigation in large bays or sounds such as Puget Sound
C. The United States is responsible for NAVAREA warnings in the North Atlantic north of 7°N，and west of 15°W
D. Long range radio navigational warnings are usually broadcast by radiotelephone，radiotelegraph，and radio-teletypewriter

[多项选择]Which of the following can LCP successfully negotiate during the establishment of a PPP connection?（）
A. Q.931
B. IPCP
C. multilink
D. CHAP
E. callback

[单项选择]Which action should be taken on receipt of a GMDSS distress alert（）.
A. Read the display screen and/or printout
B. Silence the alarm
C. Listen for any follow up voice/telex transmission on the appropriate frequency
D. All of the above