SkyDemon Forums

Vertical obstacle clearance & MSA

http://forums.skydemon.aero/Topic30018.aspx

By fhormuth - 12/27/2019 12:05:00 AM

Hi, 
I have some difficulties understanding how SD calculates a leg's MSA with respect to a particular vertical obstacle.
In this specific example I have set both terrain and obstacle clearance to 1000ft within 5 NM. There's a 2900ft antenna tower well within this range next to the leg BOLKI-OLIVI, but the MSA is calculated as only 3300ft -- fine for for the terrain, but missing some 600ft for obstacle clearance. Now, the strange thing is: if I insert an additional waypoint into the leg abeam of the antenna, it is taken into consideration -- see second screenshot. And that -- in my opinion -- does not make much sense as the actual flight path is still the same...

Any ideas what is happening here and what is behind these different results?

Thanks a lot,
Felix

Not ok:


Better:

By Tim Dawson - 1/3/2020 10:37:09 AM

You are quite correct; you've identified a bug in the current version of SkyDemon. Thank you for reporting it, it will be fixed in the next release.