buoyage noun3 •A series of buoys or floating beacons to mark the course for vessels.There is no description available of the vessel, which served here until it was replaced by buoyage marking these channels . — 2007 •Any of several codes of practice under which buoys of various shapes and colours are used for the same navigational purpose.This chart will be affected by the introduction of a new system of buoyage (IALA System A) scheduled for implementation between April and August 1977. — 1977 •A fee charged to all boats that use waters that are marked with buoys, which goes to their maintenance.Another great drawback for ships coming here is the heavy tonnage dues which are laid on every outgoing ship and the heavy buoyage tax levied on the steamers. — 1885 formsbuoyages