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Your ARPA has been tracking a target and has generated the targets course and speed．The radar did not receive a target echo on its last two scans due to the weather．What should you expect under these circumstances ________．
A.The ARPA will generate data as if the target was still being tracked by radar
B.The ARPA will give an audible and/or visual lost target alarm
C.The ARPA will generate data based on sea return echoes from the vicinity where the target was lost
D.The ARPA has lost all memory of the target and must recompute the target data
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更多 “ Your ARPA has been tracking a target and has generated the targets course and speed．The radar did not receive a target echo on its last two scans due to the weather．What should you expect under these circumstances ________．A.The ARPA will generate data as if the target was still being tracked by radarB.The ARPA will give an audible and/or visual lost target alarmC.The ARPA will generate data based on sea return echoes from the vicinity where the target was lostD.The ARPA has lost all memory of the target and must recompute the target data ” 相关考题
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单选题Your vessel was damaged and initially assumed a significant list and trim; however，further increase has been slow. Based on this data，what should you expect?（）A
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单选题You should conduct a sector search under which of the following circumstances（）.A
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单选题Your ARPA has automatic speed inputs from the log．Due to currents，the log is indicating a faster speed than the speed over the ground.What should you expect under these circumstances（）.A
The generated CPA will be less than the actual CPAB
The generated TCPA will be later than the actual TCPAC
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单选题What is TRUE of the history display of a target’s past positions on an ARPA?（）A
It provides a graphic display to emphasize which vessel is on a collision courseB
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单选题Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）A
Set and drift of the currentB
Relative track informationC
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Initial range of acquisition
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单选题When using the ARPA in heavy rain，which action should you take? （）A
Increase the radar gain to pick up weak echoes through the rainB
Increase the STC setting to reduce close-in spurious signalsC
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Increase the range of the inner and outer guard rings
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单选题When using an ARPA，what should you consider in order to evaluate the information displayed?（）A
The target vessel's generated course and speed are based solely on radar inputsB
Navigational constraints may require a target vessel to change courseC
The trial maneuver feature will automatically determine a course that will clear all targetsD
You cannot determine if a small target has been lost due to sea return
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单选题Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.A
Alert the watch officer that a vessel is approaching the preset CPA limitB
Warn of small targets that are initially detected closer than the outer guard zoneC
Guard against target loss during critical maneuvering situationsD
Sound an alarm for targets first detected within the zone
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单选题Your ARPA has been tracking a target and has generated the targets course and speed.The radar did not receive a target echo on its last two scans due to the weather.What should you expect under these circumstances（）.A
The ARPA will generate data as if the target was still being tracked by radarB
The ARPA will give an audible and/or visual lost target alarmC
The ARPA will generate data based on sea return echoes from the vicinity where the target was lostD
The ARPA has lost all memory of the target and must recompute the target data
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单选题The ARPA may swap targets when automatically tracking if two targets（）.A
are tracked on reciprocal bearingsB
are tracked at the same rangeC
are tracked on the same bearingD
pass close together
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单选题What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）A
An acquired target entering into a guard zoneB
A tracked target lost for one radar scanC
A tracked target entering your preset CPA-TCPA limitsD
A target being initially detected within a guard zone
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单选题Initially， for the Automatic Workload Repository （AWR） statistics，the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database. You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However，when you observe the Memory Advisor on a Friday，you find that the statistics are available only for two days， Thursday and Friday，of that week. What would have caused the statistics to be removed？（）A
On Wednesday， the statistics have been purged.B
On Wednesday， the retention period has been set to zero.C
On Wednesday， the collection interval has been set to zero.D
On Wednesday， the collection level has been changed to All.E
On Wednesday， the retention period has been set to one day.F
On Wednesday， the retention period has been set to two daysG
On Wednesday, the collection level has been changed to Typical.H
On Wednesday, the collection interval has been set to 1440 minutes.
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