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FT} FROM GROUND WHEN ORBITER RESTS ON LANDING GEAR SECONDARY EGRESS ROUTE PRIMARY INTERDECK ACCESS HANDHOLD ABOVE ACCESSWAY INTERDECK ACCESS HANDRAIL ACCESSWAY INTERDECK ACCESS AVIONICS BAY Figure 5-1.—Orbiter crew station. TA Y SI {LOWER DECK (TYPICAL) COMMANDER'S SEAT CREW INGRESS/ EGRESS SIDE HATCH.