What to do with the hovercraft-bottom-piece that comes with the firefighters...?
Well, my imagination did not reach further than; Another hovercraft!
This vessel has 4 lanes for 3-4 micro-cars each, and the passenger deck (including small kiosk and panoramic lounge) can hold 130 passengers total.
The craft also sports an upper sun-deck with command-bridge.
About this creation
Simple side view. Bottom-piece extended 4 studs.
Simple front view.
Simple rear view.
Turbine propeller motors and air-intakes.
This construction is 99,5% studs up. Only the windows from the command-bridge and the turbines air-intakes uses advanced construction methods. Some diagonal separation of colours are also used.
Front air-intake and passengers panoramic frontview.