Marina Exam Reviewer: ECDIS must have the capability to preserve the record of the track for the previous __________.

Marina Exam Reviewer 

ECDIS must have the capability to preserve the record of the track for the previous __________. 

A. 6 hours 
B. 12 hours 
C. 24 hours 
D. 18 hours


Answer:  B.   12 hours

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