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 datum
1.2 H to 1.25 H above the low water level

ANSWER DOWNLOAD EXAMIANS APP

Docks and Harbor Engineering
In a two lane channel, bottom width of channel is given by

Manoeuvring lane + (2 × Bank clearance lane) + ship clearance lane
Manoeuvring lane + (2 × Bank clearance lane)
(2 × Manoeuvring lane) + (2 × Bank clearance lane + ship clearance lane)
(2 × Manoeuvring lane) + (2 × Bank clearance lane)

ANSWER DOWNLOAD EXAMIANS APP