On Wed, 2011-04-20 at 14:12 +0200, Tobias Bieniek wrote:
> I agree that we could add the airspace class G to XCSoar, disabled by 
> default though because this is usually not needed at all...
>
Fair enough.

> In this particular case however I would strongly suggest writing an 
> email to whoever publishes the UK AIP because class G for a military 
> airspace is simply wrong. That is what Restricted and/or Danger 
> airspaces are for...
>
There's no chance of changing this assignment because AIP is the part of
the CAA that's responsible for defining and maintaining restricted
airspaces: what they say, goes. 

I've asked the guy who maintains the UK_AIR OpenAir files on the Soaring
Server why class G is used. His only answer was that 'AIP say so', so
evidently their reasoning isn't about to be explained to mere pilots.

Note that this assignment is only used for MATZ (the airspace round
military airfields), not for Danger and Restricted airspace. As a MATZ
can be regarded as an extended outer layer to an ATZ and an ATZ adopts
the class of airspace surrounding it, in fact all MATZ and ATZ in class
G airspace should also be class G - and indeed many of them are. Those
are the UK rules for ATZs as quoted in the BGA's Rules & Laws. 

> Once again I would suggest contacting the provider of that AIP and tell 
> him to use the right airspace classes in the open air file...
> 
I've contacted the author of SPINE, since I don't know whether AIP said
NOTAMS should be be class E or whether it was a decision by the 3rd
party provider of SPINE. There is nothing in the Rules and Laws about
what airspace class should be used for plotted NOTAMs. I'll let you know
what I find out.


Martin





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