Wrong Airspace with Navigraph selected as source

[Deimos 45]

Hey guys

whenever I use Navigraph as source for airspaces (Scenery Library -> Airspace Libraries -> Navigraph) I get those fake Class B or A around airports with the (Z) in the name. Is that a LNM problem interpreting Navigraph data, navigraph giving faulty information (so I'd need to post there) or just my error?

If I switch to Simulator it will vanish. The Simulator is updated by Navigraph as well.

Thanks for your help

 

[Gason71 128]

It's not a fake 🙂

Such B class 0-12000ft exists around Denver airport (it's the most inner part of B class area around Denver) - look at SKYVECTOR, VFR map for Denver area: https://skyvector.com/?ll=-19.244773431861812,146.75976564552437&chart=301&zoom=17
Denver KDEN airport is one of B-class space airports in USA. Here is full list of all B class airports in USA: https://en.wikipedia.org/wiki/List_of_Class_B_airports_in_the_United_States
Flying in B-class in USA is very specific, especially if you want to perform VFR flight (for example - restricted max speed up to 200kts even when you are not inside but below B class space).
Here you can find diagram airspace classes in USA: https://en.wikipedia.org/wiki/Airspace_class_(United_States)

In general FAA and  ICAO are 2 separate worlds, so if you want to fly in USA you have to read/know FAA regulations, more here: https://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&sid=3efaad1b0a259d4e48f1150a34d1aa77&rgn=div5&view=text&node=14:2.0.1.3.10&idno=14 and in other pages (there is plenty of them on the Internet).

 

Regards,
Piotr

 

Edited July 13, 2021 by ppgas

[Deimos 45]

Yes, but the sfc to 120 is not as big as it is portrayed in LNM. The sectional in comparison. In my screenshot the SFC to 120 covers the entire class B. It is as big as the bold outlined and dark shaded area. Which according to the sectional is wrong. and it is always the (Z) airspace. So you answer does not solve my question. But thanks

 

 

Edited July 13, 2021 by Deimos

[Gason71 128]

Here you can find legend for FAA VFR charts: https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/aero_guide/media/editions/17Jun2021/cug-visual-edition.pdf (page 15, B class airspace).

On the image you put above, I've found the following  B class separate areas around Denver KDEN:
1) SFC-120 (what means 0-12000ft) - on the left of Denver's runways icons,
2) 65-120,
3) 70-120,
4) 75-120,
5) 90-120,
6) 100-120,
7) 80-120,
8] 60-120
...

I hope despite my eye problems (presbyopia)  I was able to find almost all of these airspace B segments that are seen in the post/image above 😎

Regards,
Piotr
 

[Deimos 45]

Yes you get the question wrong though... The airspace in LNM is sfc to 120 ALL AROUND THE CLASS B. And there are the higher steps in there as well. So using for example the show airspace at flightplan altitude won't work because it will always display the ENTIRE CLASS B, every step of the wedding cake as sfc to 120. So I'd still say something is wrong.

Please look at my screenshot again. It shows in the tooltip: sfc to 120 where there only should be 100 to 120. I am able to read a map and was just wondering where that came from. I can also find all the elements. I cannot however find anything that covers the ENTIRE class B from sfc to 120.

Edited July 13, 2021 by Deimos

[Gason71 128]

OK, I've already undestood your question 🙂

I've made a moment ago some experiments in LNM (switching Navi sources, etc.) and it seems the (Z) segment you've mentioned, comes from Navigraph database, but I don't know yet how to solve this problem (probably it's necessary to remove this segment from Navigraph database). All other B-class segments  (A),(B),(C)...,(P) are displayed correctly.
I suppose this (Z) segment is Navigraph's "creative idea of summary space" (or something similar) - because it covers horizontal area of whole B airspace class around Denver.

In general I fly in LNM with VFR FAA charts set as background maps (us-vfr-sectionals), it's easier to perform flight and more comfortable - look at this old thread here: 

 

Regards,
Piotr

[Deimos 45]

Yeah thanks, that is what I do as well usually. I was just wondering because it seems to be right in the sim. I appreciate the time you took and the comprehensive answers you wrote 🙂

[Gason71 128]

Good news - a moment ago I've just found how to solve this problem 🙂

It's enough to switch off displaying airspaces from Navigraph sources - look at  ->LNM->Scenery Library->Airspace Libraries.
Then untick Navigraph and leave only ticked option/s: Simulator or Simulator/User.
In my XP11+LNM environment, LNM displays then only correct (A)-(P) segments without this "fake" (Z) segment.

I hope this help you.
Regards,
Piotr

[Deimos 45]

Yep, I posted that in my OP 😉 Thanks though