30. User Defined Approach¶
An user defined approach can be created and applied to all airports, even small airstrips which do not provide approach procedures.
A defined approach consists of a final approach leg which can be customized by changing altitude and length. This enables vertical guidance in the elevation profile and allows to show ILS and/or VASI slopes at the destination.
The approach does not create an airport traffic pattern or a pattern like structure. Add user defined waypoints to the flight plan for lateral guidance around the destination.
User defined approaches are part of a flight plan similar to a procedure unlike Traffic Patterns which is only a map display feature.
This type of approach can be removed like other procedures by deleting one of the legs in the flight plan table.
The approach is saved in the LNMPLN flight plan file like other approaches. User defined waypoints are used for the initial fix and runway threshold when exporting a custom approach to other flight plan formats than LNMPLN.
An user defined or custom approach consists of two waypoints which also indicate the runway name:
IF22: The initial fix or start of the approach procedure. This point has an altitude restriction based on the entry altitude above the runway which is runway
22in this example.
RW22: The runway threshold for runway
30.2. Create Approach¶
Right click into the map, flight plan table or airport search result
table on an airport and select
Create Approach for Airport and use as Destination or
Create Approach for Airport and insert into Flight Plan. The
available options depend on whether the airport is already part of the
- Dialog header: Shows airport name and its ICAO ident as well as field elevation.
Runways: List of available runways for the airport. Shows runway name, length, width, magnetic heading, surface and lighting status.
Entry distance to runway threshold: Distance from the initial fix to the runway. Default is 3 NM.
Entry altitude above runway: Altitude of the initial fix above runway elevation. Default is 1,000 ft.
Approach slope: Shows the slope angle calculated from the given distance and altitude. The default values for distance and altitude give a 3.1 degree slope.
A click on the
OK button or a double click into the list
closes the dialog and creates the approach.