A flexibly multilayer composite comprising at least one barrier layer of high hardness TPU having a Shore D hardness of at least 80, a soft segment content of less than 5%, and a low gasoline vapor transmission rate of less than 1 gM2day. The wire extends through a lumen off-set from the instrument axis and through a distal segment of the body that is to be curved for deflection at the distal end. A drive car has movable drive wheels for affirmatively engaging the track no matter the degree of curvature of the track. The framing pulse is also sent to a decoder to locate the error correction portion of the codeword. The system can be implemented entirely within a content acquisition device itself, or in a computer system coupled to a content acquisition device. The identified emergency services then perform services corresponding with the retrieval key.