Counter battery detection value

[Artillerist]

"The % CB detection" value in the national database-- in the guide this is defined as; "The chance that a fire mission will be detected and attacked by counter battery."

I'm not sure whether this means; (A) the chance that Friendly fire missions are detected and attacked by enemy counter-battery, or (B) the chance that Enemy fire missions are detected and attacked by friendly counter-battery.

For example--- if I'm modifying the US, and I set this value to 100, will my side detect 100 percent of enemy fire missions and fire counter battery 100 percent of the time
or
In setting this to 100, will my own artillery be subject to detection and counter-fire 100 percent of the time.

Thanks!

[CapnDarwin]

It the chance for your fire missions to be detected.

[Artillerist]

Thanks!