Marina Board Exam: Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the grounds. What should you expect under these circumstances?

Marina Board Exam

Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the grounds. What should you expect under these circumstances? 

A. The targets true course vector will be in error. 
B. The range on initial target acquisition will be less than normal 
C. The generated CPA will be less than the actual CPA 
D. The generated TCPA will be later than the actual TCPA 



Answer:     A. The targets true course vector will be in error. 

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