The Hammerhead Shark is a Tier 6 ship in the Nautic Series mod. It is a direct upgrade to the Sawfish given their nearly identical shot pattern; 2 fast firing cannons at the front and one fast firing cannon at the back to propel the ship forward.
NOTE: The maximum firing rate of cannons was capped for all ships to reduce lag in mods. The Hammerhead Shark's fast firing cannon is affected by this. In real games it shoots slower than originally intended but has higher damage to compensate.