Access door.

CRANE AANS ANS EL 75.3m (247 FT) — STRUCTURE EL 63.1 m (207 FT) —— EL 57.6m ZN (189 Im EL 57m (187 FT) — ROTATING FIXED SERVICE STRUCTURE SLIDEWIRE LANDING AREA The External Tank Тесіб........................ 8-13 ELECTRONIC SYSTEMS TESTS Communication links between the major frames is 76.2 to 91.4.