[SubMareener]

I helped make the instrumentation radars that measured the stealthiness of these aircraft, so they do show up on a sufficiently wide-band radar system.

[Mariner]

All targeting radars are high frequency and highly directional by necessity.

With low frequency radars, you can see the aircraft "somewhere in that direction", but you can't tell precisely where and certainly not how many if flying close.

So, the defender against them in a "strike" scenario ends up shooting at air. Even the terminal engagement radars of sophisticated missiles cannot see close enough to hit the target.

And in an air-to-air engagement (that's what the F-22 does, almost exclusively) the other aircraft cannot see them at all.

[JohnnyP]

FireFinder?