:: Ships ::
To access the ships exchange, you must be inside a powered Landing Pad or a Starport.
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:: Vehicles ::
To access the vehicles exchange, you must be inside a powered Garage, Hangar or Starport.
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:: Boats and Submarines ::
To access the boats and submarines exchange, you must be inside a powered Dry Dock, Naval Shipyard or Port, located in a River, Swamp or Ocean city.
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Is this a bug or was this implanted?

Just to clear up so you have to be inside one of said facility's?