Boats are the primary mode of transportation in the Hydro Thunder video game series. Each one is unique in its own ways, with its own advantages and disadvantages in a race. In the original game, there are four tiers, each with three boats, excluding the Bonus tier, which has four. In Hydro Thunder Hurricane, there are many more boats, including DLC boats.
NOTE: The 'X' Boats are simply higher-performance versions of their respective counterparts.