Ballista darts are, obviously, the ammunition used to fire a ballista. Ballista darts have weighted stone points affixed to sturdy oak fore-shafts with completely hollow interiors. Locked into the foreshaft, the main shaft of a dart is carved from a thin, flexible wood, smoothly finished, and spans four cubits in length. They have navy blue fletching on their socket-like necks.
Ballista darts are the only real means of damaging an enemy ship's hull. When dipped in dragon's tears they will cause an outdoor room of the target ship to catch on fire. The impact, as well, will interrupt the crewmen's rowing.