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Example : DIR TO FRZ
PRESS the DIR key on the MCDU.
PRESS the line select key next to “FRZ”
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-10 P 26/32
FCOM 19 AUG 10
Note: The system does not create a temporary flight plan when a DIR TO is used, the flight
plan modification being immediately inserted.
CASE 2. THE “TO” WAYPOINT DOES NOT BELONG TO THE FLIGHT PLAN
Example: Direct to ABC (ABC being an ident, LL or PBD or PB/PB)
PRESS the DIR key.
WRITE “ABC” into the scratchpad.
PRESS [1L] to enter “ABC” in the “DIR TO” field.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-10 P 27/32
FCOM 19 AUG 10
Clear the discontinuity and the waypoints that are not included in the new flight plan.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-10 P 28/32
FCOM 19 AUG 10
PARTICULAR CASES FOR USE OF DIR TO
If the pilot is flying a manual leg (part of a SID or STAR), ‐ the flight plan page displays “F-PLN
DISCONTINUITY”, preceded by “MANUAL” (see below).
These legs are specific heading or track legs flown with no defined end waypoint.
‐ When the pilot encounters a flight plan discontinuity or if a major reset occurs, the flight plan
page displays “PPOS - F-PLAN DISCONTINUITY”, and the pilot looses managed guidance in
both the lateral and the vertical plans.
The autopilot or flight director reverts to the basic HDG V/S (or TRK FPA) modes. Predictions
remain available and are based on the assumption that the aircraft will fly a direct leg from its
present position to the next waypoint.
‐ In both of these cases, the only way to get back to a standard flight plan is to perform a
“DIR TO” to a designated waypoint.
‐ Following a DIR TO, the message “MAP PARTLY DISPLAYED” may appear on NDs if the
new flight plan includes a very long leg. Please Refer to DSC-31-45 FLAGS AND MESSAGES
DISPLAYED ON ND for description. When this message comes up, enter an intermediate
waypoint to shorten the leg.
Note: During cruise, the DIR TO function is not available as long as uplink wind data,
received through ACARS �� , is not inserted or cancelled on the CRUISE WIND
page.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-10 P 29/32
FCOM 19 AUG 10
DIR KEY (DIRECT-TO FUNCTION)
Applicable to:
OVFY (OVERFLY) KEY
Applicable to:
The overfly key programs the Flight Management Guidance Computer to fly over a specific waypoint
or navaid. To use it :
PRESS the “OVFY” key.
A “▵” appears in the scratchpad.
INSERT it by pressing the key adjacent to the waypoint to be overflown. [3L] in this example.
The pilot cannot cancel the overfly program. If you do not want to fly over the point you have entered,
use DIR TO (direct to) the next waypoint or the heading mode, whichever is more suitable.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-10 P 30/32
FCOM 19 AUG 10
The overfly function allows you to fly over a specific waypoint, and then returns the aircraft to the
great circle track.
OVFY (OVERFLY) KEY
Applicable to:
"UPDATE AT"
Applicable to:
The pilot uses “UPDATE AT” on the progress page to manually change the position the FMGC has
computed (FM position and bias).
Use this function with extreme caution : it is apt to be inaccurate because it relies on the pilot's
estimating when a designated position has been reached.
WRITE the ident for the navaid (or waypoint, or airport) or the coordinates or the PBD or PBX at
which update is intended.
PRESS [3L] to enter the ident in the “UPDATE AT” field. The coordinates of the point, along with its
identifier (or “ENTRY” if the identifier is not in the data base), appear in that field.
PRESS [3R] to activate the update when you estimate that you are at the position.
Note: The system reinitializes the Estimated Position Error computation when a position update
　
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