(Click here if drawing doesn't appear above.) 1 Balcony. 2 Air lock. 3 Elevator No. 1. 4 Men's room. 5 Upper part of corridor. 6 Parts storage. 7 Upper part of tube treatment room. 8 Tech supply mgt center. 9 Underfloor plan of first floor. (See earlier drawing for detail.) A Upper part of mechanical and antenna cooling equipment room. B MSR digital rack power supply. C Upper part of electrical equipment room. D Upper part of mechanical and electrical equipment room. E Air lock. F MSDP digital rack power supply. (MSDP = Missile Site Data Processor)