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After inserting the offset in the flight plan, the flight plan page shows OFST in its title, and the
navigation display shows the offset flight plan with a solid green line and the original flight plan with
a dashed green line.
The offset is cleared :
Automatically (‐ holding pattern, approach), or
‐ Manually with the clear (CLR) key.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
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FCOM 19 AUG 10
Note: If the pilot enters an OFFSET when the aircraft is too close to the TO waypoint, the
FMGS may refuse to accept it, in which case the MCDU displays the “ENTRY OUT OF
RANGE” message.
INSERTING AN OFFSET
SELECT LAT REV at present position (PPOS)
WRITE the required offset value and direction (for example, L5 or 5L).
PRESS [2L] to enter the offset into the OFFSET field.
PRESS [6R] to activate the OFFSET.
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_20-30-10-15 P 26/42
FCOM 19 AUG 10
MANUAL CANCELLATION OF AN OFFSET
There are two standard methods for cancelling an offset :
1. SELECT DIR TO a waypoint (the next waypoint, for example).
2. SELECT a Lateral Revision (LAT REV) at FROM WPT.
CLEAR the OFFSET field.
PRESS [6R] to activate the temporary flight plan (cancelling OFFSET).
ALTERNATE FUNCTION
Applicable to:
GENERAL
The ALTERNATE FUNCTION performs two actions :
It reviews and defines alternate airports and ‐ inserts them into the flight plan.
‐ It allows a diversion to be activated through the ENABLE ALTN command.
REVIEW AND SELECTION OF ALTERNATE AIRPORT
Several alternate airfields may be stored in the database and assigned to a destination. When
the pilot selects a company route (CO RTE) (or a city pair), the computer strings the preferred
alternate into the active flight plan.
The pilot may review the alternate airports on the ALTN page and, if the one selected is not
suitable because of weather or fuel considerations, another alternate may be strung into the active
flight plan.
The pilot may define an additional alternate airport into the list, if necessary.
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_20-30-10-15 P 27/42
FCOM 19 AUG 10
The ALTERNATE page shows the track and distance (airway or direct) between destination and
alternate, as well as fuel management data (EXTRA fuel, assuming the associated airfield is the
alternate airport). This data will help the pilot change the preferred alternate, if necessary.
Access the ALTERNATE page through the ALTN prompt on the LAT REV page at destination.
Alternate airfields are attached to the destination.
ENTERING NEW ALTERNATE INTO THE F-PLN
If the preferred alternate is unsuitable, proceed as follows :
SELECT F-PLN key on MCDU.
SELECT LAT REV at destination.
SELECT ALTN [5L].
SELECT an AIRFIELD IDENTIFIER.
INSERT the temporary flight plan.
Note: If weather and destination airfield conditions permit, you may select “NO ALTN”.
Fuel predictions will be computed without alternate fuel.
SELECTION OF ANOTHER ALTERNATE
Fuel management information for flight to another alternate airfield may be obtained by selecting
the OTHER ALTN field.
SELECT LAT REV at DESTINATION.
SELECT ALTN [5L].
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_20-30-10-15 P 28/42
FCOM 19 AUG 10
ENTER the airfield identifier in the brackets.
• If the airfield is not in the database, the NEW RUNWAY page automatically appears.
• If the airfield is in the database and there is a company route (CO RTE) to it, the ROUTE
SELECTION page automatically appears.
SELECT the route, as appropriate, or RETURN to the ALTN page.
ENTER the distance in the brackets (if required). XTRA fuel and track (TRK) will appear.
SELECT the other alternate (OTHER ALTN) as a primary alternate if convenient. (EXTRA fuel
and DIST revert to AIRWAY distance).
INSERT it, if you want to have it as a primary alternate.
Note: The pilot can always overwrite the ‐ “OTHER ALTN”. The new “OTHER ALTN” then
replaces the previous one, which is lost.
‐ The pilot can select OTHER ALTN as a primary alternate (active flight plan), to
　
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