Please note that this FAQ refers to building in the US  version of the game. This feature is currently not available in the UK and Australian versions and some other versions of the game.

Houses vehicles that are needed for water rescue missions.
Building Cost - 500,000 or 35 coins
Expandable to 17 bays.
Can hold Large Rescue Boat (Min crew 2, max 7), Utility Unit (Max crew 4), Boat Trailer, Fly-Car
Staff need Swift Water or Ocean Navigation training to operate water units