Vector4Food
This job would be easier without all the airplanes
Understood.Maybe this is my terminal only experience speaking, but there is no way I can say with absolute certainty I would see a primary only target going 300+ knots (between 2-3 in the morning) even if they flew right over the busiest airport in the world because there is nothing going on at that time so there is nothing continuously drawing your attention to the scope. We see all arrivals hundreds of miles away so you know if you need to be more aware or less aware of everything going on in your airspace.
Our midnights here are relatively busy (10-15 airplanes at all times) minimal complexity but you're always watching.
We have little access to prime, but a constant prime target moving at 300+ knots on a constant track would be hard to miss for us (because our system disables almost all "fake" prime targets) and if it's travelling over 100 knots the target appears larger, and the symbol is bolded.