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Navigation mode capture/tracking is annunciated with a green message in the lateral capture field on the primary flight display which identifies the navigation source (VOR1/2, LOC1/2 or FMS1/2). Dead reckoning operation is annunciated with a white DR message on the primary flight display. (5) ApproachMode Approach mode generates commands to capture and track the selected navigation source displayed on the primary flight display. Tracking performance is higher, than in navigation mode. Approach mode is armed when selected, but cannot capture if the flight control computer is not receiving valid navigation data. The capture point is a function of closure rate, with the capture point moving away from the radial/beam for high closure rates. Capture will always occur if VOR deviation is less than 5% of full scale (0.1 dot), or localizer deviation is less than 30% (0.6 dot). If the other side does not concurrently capture, it will continue to operate in heading select until it independently captures. Approach mode may automatically select glideslope mode. An on-side localizer capture clears turbulence mode on both sides. Dead reckoning is provided during VOR station passage. When DME data is available, dead reckoning region is where DME distance to the station is less than 0.6 nautical mile (DME). Without DME data, dead reckoning is based on a high rate of VOR deviation. TheCRS 1knobis usedto set thecoursepointer on thepilot's PFD. TheCRS 2 knob is used to set the course pointer on the copilot's PFD. Pushing the button in the course knob will select the course required to fly directly to a station. Approach mode is selected by pushing the APPR switch on the FCP. Approach mode is cleared by pushing the APPR switch again, by selecting another lateral mode, or by changing the source of the on-side navigation signal. Flight Crew Operating Manual MASTER CSP A- 013
Flight Control and Guidance REV 56, Jan 31/03 Approach mode arming is annunciated with two messages on the primary flight display, a green HDG message in the lateral capture field, and a white navigation source identifier (VOR1/2, LOC1/2 or FMS1/2) in the lateral arm field. Approach mode capture/tracking is annunciated with a green message in the lateral capture field on the primary flight display which identifies the navigation source (VOR1/2, LOC1/2 or FMS1/2). Dead reckoning operation is annunciated with a white DR message on the primary flight display. |
