He distinguish between different gases which he gives.

4 FLIGHT-DECK FLOOR SIDE HATCH AVIONICS BAY MODULAR AVIONICS STOWAGE BAYS N PASSENGER ) el AVIONICS AND J| STOWAGE BAY WASTE MANAGEMENT COMPARTMENT PRIMARY INTERDECK ACCESS SIDE HATCH (LEFT SIDE) > ee 2 FLIGHT DECK USE LOCATION 5-17 PLBD COAS.— The PLBD COAS.