Predator
The Predator is a Police assault boat that a player can use in all but one of the Grand Theft Auto III era games and Grand Theft Auto IV. It is a special boat on the games because it has built-in .50 caliber machine guns on both sides of the boat, thus giving the ability to destroy any other boat directly in front of the Predator. This boat appears if the player gets a wanted level on the water. The Predator unfortunately does not have Vigilante Missions associated with it, and this cannot be done on this vehicle. Also in GTA IV, there is a police officer on the rear of the boat, who will shoot at you (obviously), if a wanted level is gained.