ocr: LUNAR MODULE ASCENT STAGE INERTIAL AFT MEASUREMENT EQUIPMENT UNIT WATER TANK BAY - 3) . ELECTRONIC EQUIPMENT GASEOUS OXYGEN TANK (ECS) HELIUM TANK (ASCENT) RCS QUAD' RCS INGRESS/EGRESS, FUEL HATCH TANK RCS OXIDIZER RCS APS TANK HELIUM FUEL TANK TANK