Docks and Harbor Engineering
If H is the height of the wave expected, then the height of the breakwater is generally taken as

1.2 H to 1.25 H above the high water level
1.2 H to 1.25 H above the mean sea level
1.2 H to 1.25 H above the low water level
1.2 H to 1.25 H above the datum

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Docks and Harbor Engineering
In basins subjected to strong winds and tide, the length of the berthing area should not be less than

The length of design vessel + 20% clearance between adjacent vessels
Twice the length of design vessel
The length of design vessel + 10% clearance between adjacent vessels
The length of design vessel

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