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FOMS Menu 110 (Alternate Airports Program)

The following descriptions represent the typical access and privileges afforded to users designated as Dispatch Managers/Supervisors. Users with dispatcher privileges will have limited access to a subset of the screens presented.

This data file holds records of information used in the Alternate segment of the Flight Plan program.  Files are keyed by the ICAO code for the destination airport, and each can hold up to 30 alternate airports that may be stored in the order of company preference or priority.

The modes available are:

  • Add
  • Edit
  • Delete
  • Video
  • Screen
  • Hardcopy
  • Quit

See Alternates Fields for a description of the fields used.

Add Mode

This mode should be used to add a record to the file for a destination for which there are presently no alternates on file whatsoever. If there are already alternates listed for the destination you have in mind, and you want to add more to the list, you should use the Edit mode.

Destination ICAO: Enter the ICAO, IATA or FAA code for the destination airport. The program will check to see that the selected airport is in the Airports data file, and if it is, the program will fill in the name of the airport, and position the cursor on the first field of the Alternates table.  If an Alternates file already exists for the destination airport you selected, then it will be displayed, along with a Record Already EXISTS prompt.

Alternates Table Fields

ICAO: Enter the ICAO, IATA, or FAA identification code for the desired alternate airport.  If this airport is in the Airports data file, the program will retrieve and display its IATA identifier, and the airport name.  The Great Circle Track and distance will be displayed, and the cursor will be positioned on the AWYS field.

AWYS: This field will default to the great circle distance plus 10%, but may be edited within the limits of G/C distance to G/C +200 NM. The maximum distance allowed is 2000 NM. If you wish to accept the default value, just press <Enter>.

MAX FL: Enter the maximum flight level that you wish to be used for the calculation of the flight from destination to alternate. This field is optional, and may be left blank if you wish. If so, the Flight Plan program will estimate the altitude to use based on the total route distance.

Note: The alternate routine will use the first route on file for the destination-alternate city-pair. If none exists, then it will attempt to build an MTTA route. If this fails, then as a last resort the routine will use the Great Circle track and Airways distance from the Alternates file. If a flight level has been specified, then this level will be used for the construction of the MTTA.

Rearranging the Priority of Alternates

The Flight Plan program will display the alternates in the order in which they appear in the file, or will default to the first in file depending on the entry made. Thus it is recommended that the alternates for each destination be kept in the preferred priority sequence. To change the priority of a particular alternate, move the cursor to the line which you want that alternate to occupy, and press <Ctrl>-I. This will insert a blank line at this position. Next, enter the Identifier for the station. A warning prompt will appear, indicating that this alternate is already in the table, and asking if you wish to switch priorities.  If you respond by entering <Y>, the selected alternate will be moved to the new blank line. Entering <N> will permit you to select another station. Individual alternates may also be deleted by using <Ctrl>-D.

Edit Mode

Entering <E> from the Command Line will put you into Edit mode. In this mode you may do the following tasks:

change the priority sequence

add more alternates for a destination (up to a maximum of 30), or delete one or more alternates (using <Ctrl D>)

If there are more than 15 alternates for a particular destination, you may move to the second page of an alternates table by using <Ctrl F>. <Ctrl B> can be used to shift from the second page back to the first.

Once you have completed your edits, you may escape to a confirmation prompt by entering <Ctrl E>.

Delete Mode

Note: Delete mode should only be used when you wish to delete ALL of the alternates associated with a particular destination, generally in preparation for deletion of the destination from the Airports data file.  If you only wish to delete one alternate from record, use the <Ctrl D> function from within the Edit mode.

When you enter the ICAO code for a destination airport, the program will display the table of alternates for that station, along with a prompt to confirm that you do wish to delete them all. A <Y> response will delete the destination and all of it’s alternates from the file, while a <N> response will clear the screen and re-position the cursor in the Destination ICAO field for entry of another station.

Video Mode

Calling up the Video mode will enable you to view a selected Destination and its alternates, and to step through the data file alphabetically, using the up and down arrow keys.  The initial screen displays the usual blank record, and requests entry of an initial Destination ICAO code. The file is sorted alphabetically by ICAO code of the Destination airport. Pressing <Enter> will clear the display, and permit you to enter a new destination.

Screen Mode

This mode will allow you to review the Alternate tables for a range of destinations at one time.  Entering <S> from the Command Line will call up the Report Selector screen, and position the cursor in the first field.

Type of Identifier: Enter <I> for a report of stations with an ICAO code, or <N> for a report of stations that do not have an ICAO code.  In the latter case you will then have to enter the country code of the stations.

From and To: Enter the ICAO codes for the range of stations you wish to have reported. For example, entering CY to CY will call up a display of all airports in Canada and their alternates.

Country Code:  This field can be used to request all of the alternates for all of the airports in a specific country.

To view the second and subsequent pages of the report, press <Enter>.  Pressing <Enter> on the last page of the report will return you to the report selector screen. Entering <Q> at any point in reviewing the report will have the same effect.


Alternates Fields

The following descriptions represent the typical access and privileges afforded to users designated as Dispatch Managers/Supervisors. Users with dispatcher privileges will have limited access to a subset of the screens presented.

Add Mode

This mode should be used to add a record to the file for a destination for which there are presently no alternates on file whatsoever. If there are already alternates listed for the destination you have in mind, and you want to add more to the list, you should use the Edit mode.

Destination ICAO: Enter the ICAO, IATA or FAA code for the destination airport. The program will check to see that the selected airport is in the Airports data file, and if it is, the program will fill in the name of the airport, and position the cursor on the first field of the Alternates table.  If an Alternates file already exists for the destination airport you selected, then it will be displayed, along with a Record Already EXISTS prompt.

Alternates Table Fields

ICAO: Enter the ICAO, IATA, or FAA identification code for the desired alternate airport.  If this airport is in the Airports data file, the program will retrieve and display its IATA identifier, and the airport name.  The Great Circle Track and distance will be displayed, and the cursor will be positioned on the AWYS field.

MFL: Enter the maximum flight level that you wish to be used for the calculation of the flight from destination to alternate. This field is optional, and may be left blank if you wish. If so, the Flight Plan program will estimate the altitude to use based on the total route distance.

IFR Fuel: Enter the IFR fuel amount for airport approach.

Time: Enter the IFR fuel in minutes for airport approach.

Note: The alternate routine will use the first route on file for the destination-alternate city-pair. If none exists, then it will attempt to build an MTTA route. If this fails, then as a last resort the routine will use the Great Circle track and Airways distance from the Alternates file. If a flight level has been specified, then this level will be used for the construction of the MTTA.

Rearranging the Priority of Alternates

The Flight Plan program will display the alternates in the order in which they appear in the file, or will default to the first in file depending on the entry made. Thus it is recommended that the alternates for each destination be kept in the preferred priority sequence. To change the priority of a particular alternate, move the cursor to the line which you want that alternate to occupy, and press <Ctrl>-I. This will insert a blank line at this position. Next, enter the Identifier for the station. A warning prompt will appear, indicating that this alternate is already in the table, and asking if you wish to switch priorities.  If you respond by entering <Y>, the selected alternate will be moved to the new blank line. Entering <N> will permit you to select another station. Individual alternates may also be deleted by using <Ctrl>-D.

Edit Mode

Entering <E> from the Command Line will put you into Edit mode. In this mode you may do the following tasks:

change the priority sequence,

add more alternates for a destination (up to a maximum of 30), or delete one or more alternates (using <Ctrl D>).

If there are more than 15 alternates for a particular destination, you may move to the second page of an alternates table by using <Ctrl F>. <Ctrl B> can be used to shift from the second page back to the first.

Once you have completed your edits, you may escape to a confirmation prompt by entering <Ctrl E>.

Delete

Note: Delete mode should only be used when you wish to delete ALL of the alternates associated with a particular destination, generally in preparation for deletion of the destination from the Airports data file.  If you only wish to delete one alternate from record, use the <Ctrl D> function from within the Edit mode.

When you enter the ICAO code for a destination airport, the program will display the table of alternates for that station, along with a prompt to confirm that you do wish to delete them all. A <Y> response will delete the destination and all of it’s alternates from the file, while a <N> response will clear the screen and re-position the cursor in the Destination ICAO field for entry of another station.

 

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