Once a departure is activated, the system Course Deviation Indicator (CDI) full scale deflection is set to 0.3 NM. The CDI scale changes to 1.0 NM (terminal mode) then ramps up to 2.0 NM (enroute mode) at 30 NM from the departure airport. When 31 NM from the active waypoint, the CDI scale smoothly transition from 2.0 NM back to 1.0 NM (terminal mode). At 2.0 NM before the FAF during an active approach, the CDI scale transitions down further based on the service level of approach activated (LNAV, LNAV/VNAV, LP, LPV). When a missed approach is activated, the CDI is set to 0.3 NM. See the Course Deviation Indicator (CDI) Scaling in the Flight Instruments section for more details on CDI scaling.