I have investigated a lot in the KnowsAbout routine in combination with the Camouflage Coeficient as I develop a Mod for Camouflage. I first thought that the Camouflage Coeficient is completly broken. But I figured out that it is working just when you spawn enemies far away (800m Plus). When you spawn Enemies closer (<600m) enemies detect the player at much farer distances than they should.
I have build a sofisticated TestScript and Mission which spawns Enemies and let them run to the Player. When they detect the Player they Get killed an create a marker at the possition they detected me.
This way I was able to test this very good. In the Attached File
Arma Branch : Main Branch
Arma Version: 2.10.149799