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A Doppler log in the volume reverberation mode indicates the ______.
A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
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单选题A Doppler log in the volume reverberation mode indicates（）.A
speed being made goodB
speed through the waterC
the set of the currentD
the depth of the water
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单选题The system administrator notices that there is an I/O bottleneck on one of three disks in datavg volume group. This problem disk contains the JFS log， loglv00 and one filesystem， /mydatabase. There are no other logical volumes on this disk. Which of the following options would be the best solution？（）A
Increase the size of the JFS log logical volume so more transacations can be written to this log.B
Create a second， additional JFS log and have the /mydatabase logical volume point to both JFS logs.C
Migrate the JFS log device to another physical disk in the same volume group.D
Only one JFS log device for each volume group can be used. Use the migratepv command to move the JFS log device to an empty disk in another volume group.
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单选题A system administrator boots a server in normal mode, the boot process displays and LED 551 and stops. LED 551 indicates the root volume group is being varied on. All of the following are probable causes of the problem EXCEPT:（）A
The bosboot command failed to complete.B
The JFS log device is corrupted.C
The initttab file is corrupted.D
The /dev entries or /etc files are missing.
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单选题A Doppler log in the bottom return mode indicates the（）.A
velocity of the currentB
bottom characteristicsC
depth of the waterD
speed over the ground
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单选题（）is the process by which the position of the vessel at any moment is found by applying the last well-determined position to the run that has been made since，using for this purpose the ship’s course and the distance being those indicated by log.A
dead reckoningB
dead weightC
dead slow aheadD
dead slow astern
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单选题A Doppler speed log indicates speed over ground（）.A
at all timesB
in the bottom return modeC
in the volume reverberation modeD
only when there is no current
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单选题Gross tonnage indicates the vessel’s（）.A
displacement in metric tonsB
total weight including cargoC
volume in cubic feetD
the volume of the enclosed space
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单选题What will NOT induce errors into a doppler sonar log?（）A
Increased draftB
PitchC
RollD
Change in trim
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