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. Of these statements

Docks are for loading, unloading, and repair of ships, while harbours provide safe shelter and anchorage for ships and allow the transfer of passengers and cargo between the ship and the land.