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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 limit
B
Warn of small targets that are initially detected closer than the outer guard zone
C
Guard against target loss during critical maneuvering situations
D
Sound an alarm for targets first detected within the zone
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更多 “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” 相关考题
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