In my mind this is the vehicle bringing you from the lobby to space in the likeness of the hydrolators from the original seas pavilion at Epcot. There is a room you enter after checking in and passing through security where you enter an “elevator” that brings you to the ship in space where you will be staying. To get from your ship, in space, to Batu you take another ship on the opposite side of the hotel... I mean ship(port side if my memory serves correct) and enter a bus... I mean shuttle transport via a gangway. All of which is themed to give the illusion of being in space the entire time.