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1       Introduction 

Route Building - Basic 

This simulation will be comprised of a step-by-step walkthrough showing how to build a practical route, including consideration of rules, and the method of efficiency.  The Basic Route walkthrough will show functionality required for a domestic route within North America. 

We estimate that this will take 3 minutes to complete.

2       Detailed Explanation 

What is MTTA? 

MTTA creates a route using the following steps:

        Creates a list of all transition points of each SID to the transition points of all STARs (if available)

        Once it determines the first waypoint, it will determine the airway or direct legs that run from that waypoint

        Next it will determine the time to the next waypoint considering the user settings

        MTTA compares all options waypoint by waypoint and rejects ones with the greater time, fuel or cost (depending on user settings)

        Any route that is greater than 30% of the Origin to Destination distance is discarded
 

The process is continued until all possibilities are tested, leaving the most optimal route with the least accumulated time, fuel or cost

 

What is MTTA Factor?

The MTTA search space allows you to configure the area of searchable between origin and destination.  The greater the search factor, the more possible waypoints you can use in building your route.  This value can be set within the range of 1.1-2.0.

For example, an MTTA factor of 1.1 tells the system to use a corridor width that is 10% of the distance between two waypoints at halfway between the two waypoints.

MTTA - will optimize using airways

MTTH - will optimize using HAR

Interaction 1

Interaction 1 Click the New button.

To begin, start in the Route screen and click New.

If your company has stored routes, they will appear as a list on this screen.

Interaction 1

Interaction 1 Click the Generate button.

The route defaults to MTTA in the text box.  You can paste a route you created into this box or use MTTA.

You may select a SID/STAR or you can leave it blank and the MTTA will select the best available.

Optimized routes are based on 3 options: Least Fuel, Least Cost and Least Time

Interaction 1

Interaction 1 Click the Apply button.

Applying the route updates the flight plan, but it will not run a compute. This allows you to make additional changes to the plan as needed.

Your new route now appears in the Plan screen

Interaction 1

Interaction 1 Click the ORIG KLAX dropdown button.

This example demonstrates what happens when a route cannot be built.

Change the runway out of KLAX on this route using the same SID and transition.

Interaction 1

Interaction 1 Click the 24L list item.

Interaction 1

Interaction 1 Click the Generate button.

When the runway is changed from 6R to 24L, the SID turns red.  This means that the SID is not available for that runway selection.

Interaction 1 Click Error message.

An error is generated and displayed in the lower-left area of the application if you attempt a compute while the SID field is red. You will not be able to generate a flight plan.