Mooring boats and linespeople

A ship needs to be secured to the wharf or it will move and bump about, possibly damaging the ship and the wharf.

Special boast called mooring boat can take the mooring line from a ship to the wharf. Another way to do this is for the ship’s crew, at each end of the ship, to throw a heaving line to the lines people on the wharf. 
The heaving line is a thinner line connected to a much heavier mooring ropes. The end of the mooring rope is placed over a bollard. The mooring rope is tightened by a winch (machine) on board the ship. To secure a ship, there are a minimum of three mooring ropes at each end of the ship secured to bollards on the wharf.