[Bug] Displaced Threshold Confuses Jester

[Clarion]

When taking off runway 21 at Beirut-Rafic, Jester doesn't understand what the displaced threshold is and gets very upset with you since he thinks you are taxiing way too fast.

Edited May 24, 2024 by HB_Painter
Classification of Bugs and User reports

[Zabuzard]

Afaik this runup area is not meant to take off from. He sees it as taxiway as declared in the map properties.

[Clarion]

The signage and markings are the same as the signage for a displaced threshold as defined by the FAA:
https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap2_section_3.html

Quote

Displaced Threshold. A displaced threshold is a threshold located at a point on the runway other than the designated beginning of the runway. Displacement of a threshold reduces the length of runway available for landings. The portion of runway behind a displaced threshold is available for takeoffs in either direction and landings from the opposite direction. A ten feet wide white threshold bar is located across the width of the runway at the displaced threshold. White arrows are located along the centerline in the area between the beginning of the runway and displaced threshold. White arrow heads are located across the width of the runway just prior to the threshold bar, as shown in FIG 2-3-4.

Obviously Beirut-Rafic isn't within FAA jurisdiction but the signage and markings are consistent with the FAA so I assume it is an international standard.  If it was intended to only be a taxiway they would have kept the markings for a taxiway and used a demarcation bar at the runway threshold.

However, if it is a fault with the map, then this topic should be moved to the map's forum?

[Blackeye]

Is there a map property for a displaced threshold?

If not I'd think if you made it a runway the AI would use it for landings as well?

[trev5150]

11 hours ago, Zabuzard said:

Afaik this runup area is not meant to take off from. He sees it as taxiway as declared in the map properties.

Threshold/overrun/underrun are not runup areas. It's legal and common practice to use the approach end threshold for takeoff run. That's an extra 500-1000 feet of takeoff roll in some places. The purpose of displaced threshold is obstacle avoidance on precision approaches to minimums and remaining on glideslope to touchdown in the landing zone (between the Captain's Bars).

Edited May 23, 2024 by trev5150

[Zabuzard]

Fair enough. We have to see if we can do something about it from our end. Jester takes the data straight from the map properties, it is not defined by us.

Will look into it!

Edited May 24, 2024 by Zabuzard