cannot reproduce and missing track file APG73: BVR vs ACM physics

[Yuriks]

Same radar, but detection and acquisition range drop from 20nm in BVR to 10 and 5nm in ACM depending and modes. Trying to understand why

   

[Harker]

ACM modes are range gated. Targets can be detected, but they are rejected beyond a certain range, since the point of ACM is to focus on nearby targets.

[Yuriks]

Interesting, I though it was a tradeoff for something like faster scanning (guess) 

What is the purpose of limiting VACQ by 5nm while Boresight 10nm? 

[Harker]

Interesting, I though it was a tradeoff for something like faster scanning (guess) 
What is the purpose of limiting VACQ by 5nm while Boresight 10nm? 

Just how the real thing works, based on public info. BST and WACQ place the range scale to 10 nmi, VACQ to 5 nmi.

If I had to guess, I'd say the decision to limit VACQ to 5 nmi is that you're mainly using it to lock a defending target that's above or below your HUD limits during ACM and you want to avoid locking anything else that might be further out.