CHAPTER 3 SYSTEMS: STRUCTURE AND MECHANISMS—THE INTERNATIONAL SPACE STATION’S SKELETON 58 the center of the ISS, the rack on the forward wall of that rack bay), locker D1 (a label is located on each locker location A and B are at the top of the rack). This common location coding system is also used as part of the Inventory Management System, thus enabling all equipment on the ISS to be tracked to a specific location. Figure 28. The Fluids Integrated Rack (FIR) at LAB1S4 is an example of a payload facility rack. Here, Expedition 29 Commander Mike Fossum works on an experiment inside the glove box that is part of the FIR rack (2011). Figure 29. European Space Agency Astronaut Leopold Eyharts, Expedition 16 flight engineer, holds a closeout panel in the newly attached Columbus laboratory during the STS-122/ISS-1E (2008) mission. This panel bears the names of European engineers who built Columbus. Note the other white closeout panels—both hard panels and soft fabric panels—inside Columbus. Closeouts Many of the racks and standoffs have closeout panels installed to keep the ISS looking nice, to avoid numerous open holes and places for items to get lost, to aid proper airflow through the station, and to aid in fire suppression and prevention