單項(xiàng)選擇題Which message categories cannot be disabled by the GMDSS radio operator（）.

A.Navigational Warnings
B.Meteorological Warnings
C.Search and Rescue Information
D.All of the above


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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題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