Docks and Harbor Engineering
The maximum harbour depth below lowest low water is generally equal to(i) loaded draft + 1.2 m when bottom is rock(ii) loaded draft + 1.8 m when bottom is soft(iii) loaded draft + 1.2 m when bottom is soft(iv) loaded draft + 1.8 m when bottom is rock

(iii) and (iv) are correct
(ii) and (iv) are correct
(i) and (iii) are correct
(i) and (ii) are correct

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

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

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