The Advanced Alternates page allows you to enter your alternate airports (in case you have not done so already on the Standard page), and specify other controls over the alternate calculation process. Additionally, you may apply a JAR-OPS compliant feature, Uplift Philosophy, to meet JAR requirements for arrival alternates.


Typically, if the Standard page has already been completed, the alternates you entered there will be displayed here (i.e., on the Advanced Alternates page). You may enter one to four arrival alternates on this page. The first entry (top) is the primary alternate, the next three are secondary.


NOTE: The output of secondary alternates is format dependent.


To enter alternates, select an Alternates box and type a four character ICAO or three character IATA code.


Example:

Arrival Alternate Example


In general, when hold time is specified with a primary alternate, the hold fuel calculation is based on the aircraft weight at that alternate (rather than at the POA). To enter a hold time, select the Hold Time box and type the number of minutes you wish to set for holding.


Example:

Arrival Alternate/Hold Time Example


Given no stored alternate information for route or distance, JetPlan uses great circle routing to determine the distance and fuel to the alternate. You may override this default functionality by specifying your own distance value to the alternate. JetPlan will calculate the appropriate fuel amount based on the new distance value.

To enter a distance, select the Distance from POA box for any alternate and type a value, in nautical miles.


Example:

Arrival Alternate/Distance Example


You may also override a stored distance or route to the alternate by specifying an ad hoc route file. JetPlan will calculate the appropriate fuel amount based on the distance determined by the route stored in the file.

To enter a route, select the Route Name box for any alternate and type a file name from your customer Route Database.


NOTE: Routes must be stored in your customer Route Database before they can be applied as an alternate override.


Example:

Arrival Alternate/Route Example


Uplift philosophy states that the alternate requiring the most fuel be the basis for the amount of total fuel transported. When this option is used, JetPlan will determine the fuel requirements for each alternate specified and apply the amount deemed to be greatest in the departure fuel total. This option complies with JAR-OPS requirements (as long as a minimum of two alternates is specified).

To apply this option, select the Uplift Philosophy box and type the numeric value: 2, 3, or 4. While the value should correspond to the number of alternates specified, you may enter a value that is less than this. For example, the input, 2, indicates that the first two alternates be evaluated (regardless of whether there are 2, 3 or 4 alternates.


CAUTION: Never enter a value greater than the number of alternates listed.


Example:

Arrival Alternate/Uplift Philosophy Example



For more information on this and other JetPlan features, go to the available online (PDF) documentation by clicking the following link: JetPlan Manual?