I remember reading in threads that 20% heat is the threshold at which point a ship disappears from radar at a certain range at least. Just noticed that my exploration Anaconda runs at 19% heat which its small 3d shields up, so i was wondering if anyone knew what the case might be. I still get scanned by police when entering stations. Asking cause i play in open, at Colonia region atm, and an exploration vessel is kind of vulnerable..