The Hammer Head is a tow-craft belonging to Jet Black.
The Hammer Head was 21.5m long, weighing 15.3 tons.
The Hammer Head is both able to land on ground and water. When landing on water, the "wings" on the back of the Hammer Head are used for floating. For landing on ground, ordinary landing gear is used. The wings are folded in this mode and the tow harpoon is swiveled to the front for saving space.
Being a tow craft, the Hammer Head doesn't feature guns or missile launchers. However, it has a harpoon-like tow chain that can be used to catch other vehicles. This device is swiveled to the back when flying or landing, but is designed to shoot forward, making it capable of precision shooting. It also features retractable claw-like extensions on the nose which can be used to clear obstructions.
Jet used the Hammer Head to visit Alisa in Marvis. As he left, he found Spike going after Alisa and Rhint Celonias, and he chased after them himself instead, weaving in and between buildings as he did so.
Jet flew the Hammer Head to take on a prison ship carrying Udai Taxim and other prisoners who had taken the ship over. He stored it in Fad's ship until they reached the area, then he took off. He dodged several bullets and rockets, finally hooking onto the ship and pulling the ship's pod to the hull so he could board.
Jet waited in the Hammer Head while Faye confronted hackers Ruth George and Herman for the first time. The Red Tail was hit with a virus and fired on the Hammer Head, to both of their astonishment.