 Each consisted of a four-tier auditorium, dominated by a large map screen, which, with the exception of Apollo lunar flights, had a Mercator projection of the Earth, with locations of tracking stations, and a three-orbit "sine wave" track of the spacecraft in flight.Each MOCR tier was specialized, staffed by various controllers responsible for a specific spacecraft system.MOCR 1, housed on the second floor of Building 30, was used for Apollo 5, Apollo 7, the Skylab and the Apollo-Soyuz Test Project (Saturn IB) missions.