crews were required to replenish food stuffs more frequently. The low freeboard of the galley meant that in close action with a sailing vessel, the sailing vessel would usually maintain a height advantage. The sailing vessel could also fight more effectively farther out at sea and in rougher wind conditions because of the height of their freeboard. Under sail, an oared warship was placed at much greater risk as a result of the piercings for the oars which were required to be near the waterline and would allow water to ingress into the galley if the vessel heeled too far to one side. These advantages and disadvantages led the galley to be and remain a primarily coastal vessel. The shift to sailing vessels in the Mediterranean was the result of the negation of some of the galley's advantages as well as the adoption of gunpowder weapons on a much larger institutional scale. The sailing vessel was propelled in a different manner than the galley but the tactics were often the same until the 16th century. The real-estate afforded to the sailing vessel to place larger cannons and other armament mattered little because early gunpowder weapons had limited range and were expensive to produce. The eventual creation of cast iron cannons allowed vessels and armies to be outfitted much more cheaply. The cost of gunpowder also fell in this period. The armament of both vessel types varied between larger weapons such as bombards and the smaller swivel guns. For logistical purposes it became convenient for those with larger shore establishments to standardize upon a given size of cannon. Traditionally the English in the North and the Venetians in the Mediterranean are seen as some the earliest to move in this direction. The improving sail rigs of northern vessels also allowed them to navigate in the coastal waters of the Mediterranean to a much larger degree than before. Aside from warships the decrease in the cost of gunpowder weapons also led to the arming of merchants. The larger vessels of the north continued to mature while the galley retained its defining characteristics. Attempts were made to stave this off such as the addition of fighting castles in the bow, but such additions to counter the threats brought by larger sailing vessels often offset the advantages of galley. Introduction of guns From around 1450, three major naval powers established a dominance over different