Airspaces have a lateral and vertical boundary, which results in airspaces adjoining other and thus having a shared vertical boundary. Which airspace class do these shared vertical boundaries belong to?
Dortmund's (EDLW) control zone is a class D from
2500ft MSL, on top of this control zone is a TMA airspace class D from
2500ft MSL to
4500ft MSL thereafter class E from
4500ft MSL to
FL100and above that we have class C airspace from
(Image Source: www.skyvector.com - Map Data: skyvector, ARINC, OpenStreetMap)
If an aircraft wants to occupy
4500ft MSL or
FL100, which airspace class are they in?