Here is an ACTUAL picture of the No Fly Zone ..as you can see there are areas you can park very close to the city without crossing it "H" shaped beacons (BELOW) ..This seems to be an ALTITUDE marker they are all over the place and flash and can be seen easily from very high altitude on approach ..fly BELOW these and you will get an increased audible alarm..then explode ( this will happen very quick even at SCM speeds you may not notice the alarm) its also important to note ..there are areas that are slightly higher than other ..the no fly zone is NOT flat across the top of the city! ..but the markers are accurate The "Teasa Spaceport" signs form a square around the landing hangars in the middle of the city this is the ONLY area its safe to go below the "H" shaped Altitude markers , and even then it seems that doing so at high speed will set off the audible alarm of impending doom so make sure your landing gear is down when you go below them the safe zone also seems to get tighter to the Hangars as you get closer to them … the red wall is right up to the edge of the hangar by the time you get to the ground lvl . So by the time you are at the hangars its MUCH smaller than the Teasa Spaceport signs lead you to believe I would add too I found the BIG building (you can see this in the first picture) it has a no fly zone very close to it . In short its a big bullseye and the No fly zone comes right up the edge of the hangars in the safe zone ...you can travel all over the city staying above the "H" markers its really not as bad as it seems when you dont know whats going on I would like to see CIG make the no fly zone visible when you turn on SCAN mode if your in the warning zone right now it shows up for a split second on approach ..until we move on to tier 1 no fly Technically its safe to say the front 4 Teasa Spaceport signs closest to the BIG building are the only ones you can truly use to go all the way to the ground level ...look close at the first Pic with the no fly zone visible and you see how small the ground level safe zone is around the hangars