What does dashed blue lines overlay with thick faded blue lines mean in an aeronautical-chart?
Overall: Turkey system may be specific

Turkey is not integrated in the Single European Sky. The harmonization and simplification of airspace classification going on in many European countries is not applicable to Turkey, so we are in a kind of specific case which requires more research effort to understand it. See this Eurocontrol report.

From the documentation I happen to read, the Turkish airspace system is seemingly as efficient as another and, for instance, is more efficient in releasing military areas (SUA) to civil use when possible.

I wasn't able to find any description. If you can register to the Turkey AIP, you should have access to the relevant data.

Additional information from ICAO GIS Viewer

The same area than the one in the question in the ICAO viewer. I have selected different layers (a bit of learning would be needed to understand all of them), and highlighted data for three areas:

  

I selected only the lower space, else the viewer display is really cluttered because the developers haven't done a great job in managing label locations. The areas are:


Yellow: ANKARA ACC SCTR 8 LOWER. GND to FL325.
Blue:  ESENBOGA CTLZ. SFC to 4,500 AMSL
Green: AKINCI CTLZ. SFC to 12,000 AMSL


You can click on an area and a list of descriptions is displayed. You can browse this list with the arrows on the popup title bar (multiple areas may be relevant for the point you clicked). For AKINCI CTLZ:

  

Which class of airspace are they? Which rules are associated with them? I've really no idea and the legend in the viewer doesn't help:

  

Special use airspace (SUA)

I think it's still reasonable to interpret for non-professional purposes the area names this way (LT being the ICAO prefix for Turkey):


LTD: Danger (e.g. LDT-20)
LTR: Restricted or Regulated (e.g. LTR-30)
LTP: Prohibited (e.g. LTP-0097)
LTM: Military (e.g. LTM-LTANKZ1).


So these are SUA.

Documents that may be interesting


ATC Prosedür ve Operasyonları Kılavuzu from IVAO Turkey.


Get additional help

You may also want to look at PPRuNE which is a discussion board for pilots. You'll find pilots flying in/to Turkey, and they may provide you more information.