Lodesman

River and harbor pilotage, in English maritime affairs, is called loadmanage, from loadsman or lodesman, a kind of pilot established for the safe conduct of ships and vessels in and out of harbors, or up and down navigable rivers.

For much of the Middle Ages, ships had only three ranks of seamen: master, lodesman or navigator, and mariner.

Such has always been the importance of preserving the life and cargo carried by ships that pilots (or 'lodesmen') have been employed for centuries as freelance mariners.