Page:History of merchant shipping and ancient commerce (Volume 2).djvu/462

 to find one. The duty of the seventh and last of these boats is to take the pilots out of vessels outward bound, and when she has her complement of pilots and apprentices on board, to return with them to Liverpool.

The pilotage rates, limited by Act of Parliament, are levied by scale according to the draught of water. An extra charge, regulated by the Mersey Docks and Harbour Board, is allowed for piloting ships beyond the Liverpool pilotage limits, as also for transporting vessels from certain prescribed places, or transferring them from one dock to another.