Marina Exam Reviewer: If it is thought or known that floating aids to navigation (buoys) have shifted how should this be interpreted on ECDIS?

Marina Exam Reviewer

If it is thought or known that floating aids to navigation (buoys) have shifted how should this be interpreted on ECDIS? 

A. Physical buoy positions may differ from charted locations on ECDIS as with any type of chart information. 
B. Charted buoy locations are always more reliable than own ships GPS position information. 
C. ECDIS is not up to date it must be updated by the class 
D. None of the given choices 


Answer:     A. Physical buoy positions may differ from charted locations on ECDIS as with any type of chart information. 

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