Creating a course reversal procedure leg (Aviation)

The Procedure Leg PI function creates a course reversal procedure leg feature based on a single defined coordinate and other input parameters.

Steps:

1. Start ArcMap.
2. On the menu bar, click Customize > Toolbars > Production Feature Builder.
3. Click the Feature Builder button on the Production Feature Builder toolbar.

   The Feature Builder window appears.

   Tip:

   The Feature Builder window can be placed anywhere in ArcMap, or in the Table Of Contents window, with the aid of the arrows showing the possible placement positions.

4. If the scratch dataset has not been added to the table of contents, click the Add Scratch Data Layers button at the top of the Feature Builder window.

   The dataset is added to the map using the current spatial reference.

5. Choose Procedure Leg PI in the list on the Functions tab.

6. Define a coordinate for the start point of the polyline by doing one of the following:
   • Click the Pinprick tool on the Production Feature Builder toolbar and click on the map
   • Type the coordinates in the cells on the Input tab in the Coordinates area.
   Tip:

   To view the input coordinates on the map, double-click the row headers for each coordinate.

7. Click the cell next to Distance For First Turn and type a value.

   This is the distance from the specified coordinate to the first turn. The default unit is Nautical Miles.

   Tip:

   Right-click the parameter name and change the unit of measurement. If you change the unit of measurement after defining a value, the value is converted to the new unit of measurement, and you may need to redefine the value.

8. Click the cell next to Azimuth and type a value for the angle at which the procedure leg is going to be oriented.

   This is the angle for the procedure leg from the specified coordinate. The default unit is degrees.

   Tip:

   Right-click the parameter name and change the unit of measurement. If you change the unit of measurement after defining a value, the value is converted to the new unit of measurement, and you may need to redefine the value.

9. If necessary, click the cell next to MagVar Value and type a value for the magnetic variation.

   This can be a specified value or from a field defined in the MagVar Source parameter. The default unit is degrees.

   Learn more about the magnetic variation value

Tip:

Right-click the parameter name and change the unit of measurement. If you change the unit of measurement after defining a value, the value is converted to the new unit of measurement, and you may need to redefine the value.

10. If necessary, click the drop-down arrow next to MagVar Source and choose a source for the magnetic variation.

    This is the source of the magnetic variation value.

    Learn more about the magnetic variation source

11. If necessary, click the drop-down arrow next to MagVar Year and choose a different year for the World Magnetic Model.

    This is the year associated with the magnetic variation value.

    Note:

    You can only choose a value for MagVar Year if Magnetic Model is selected for the MagVar Source property.

    Learn more about the magnetic variation year

12. If necessary, click the drop-down arrow next to Clockwise and choose False.

    This indicates whether the procedure leg is created in a clockwise direction. There are two options:

    • True—The procedure leg is created in a clockwise direction from the Distance For First Turn to the end of the procedure leg.
    • False—The procedure leg is created in a counterclockwise direction from the end of the procedure leg to the Distance For First Turn of the procedure leg.
13. Click the cell next to Distance After 45 Turn to 180 Turn and type a value.

    This is the distance between the first turn and the 180-degree turn. The default unit is Nautical Miles.

    Tip:

    Right-click the parameter name and change the unit of measurement. If you change the unit of measurement after defining a value, the value is converted to the new unit of measurement, and you may need to redefine the value.

14. Click the cell next to Turn Radius and type a value.

    This is the radius of the 180-degree turn. The default unit is Nautical Miles.

    Tip:

    Right-click the parameter name and change the unit of measurement. If you change the unit of measurement after defining a value, the value is converted to the new unit of measurement, and you may need to redefine the value.

    Tip:

    To correctly create the course reversal procedure leg, the radius must be at least half the value specified for Distance After 45 Turn to 180 Turn.

15. Click the Execute button .

A line is created representing a course reversal procedure leg.