The gun deck usually ran over the rowers' heads, but there are also pictures showing the opposite arrangement. Galleasses usually carried more sails than true galleys and were far deadlier;[3] a galley caught broadside lay all but helpless, since coming broadside to a galleass, as with a ship of the line, exposed an attacker to her gunfire. Relatively few galleasses were built—one disadvantage was that, being more reliant on sails, their position at the front of the galley line at the start of a battle could not be guaranteed.