Tech Level news: so, you can buy a Gauss Rifle now

[Varyon]

Originally Posted by Joseph Paul

As long as active measures are effective there is no need to have radscanners as a military PESA technology for artillery.

Active measures give away your presence and position, while passive measures do not. So, given equal performance, passive measures are better. That said, I think radar that detects both the path and position of incoming fire has superior performance compared to a passive system that detects the EM pulse of the firing weapon, so it's a question of trade-offs. If what you're looking for is "I want to know where I'm being attacked from, so I can call down the thunder on the mortar team," the passive system is better; if what you're looking for is "I want to know where the projectile is and where it's headed, both so I can determine if it's worth using up point-defense ammo on and so I can actually hit it if I do so," the active radar is what you want.