151.1. A Gear's Location is the Base or Battlefield it currently occupies.
151.2. Gear cannot normally become located at a Battlefield unless by some special means. Example: Gear are always played to Base. The only exception is a gear played from Facedown, which is played to the Battlefield it was played from. Gear can also become located at a Battlefield if they are attached to a unit who becomes located at a Battlefield. See rule 811. Hidden for more information. See rule 716. Attachment for more information.