In basins subjected to strong winds and tide, the length of the berthing area should not be less than____________________?

In basins subjected to strong winds and tide, the length of the berthing area should not be less than____________________?

A. the length of design vessel
B. the length of design vessel + 10% clearance between adjacent vessels
C. the length of design vessel + 20% clearance between adjacent vessels
D. twice the length of design vessel