Concealment is not reduced by absolute -10%, but the 10% relative to the opponent's tank concealment. Similarly -15% applies to relative bush concealment.
Having Comm's VS against moving…
- EBR with 50% concealment becomes: 50% * (1 – 0.1) = 45%, i.e. 5% absolute concealment reduction, not 10% as the docs confusingly suggest.
With view range 439m: (439m – 50m) * (1 – 0.45) + 50m = 264m, not 283.4m. - Med Tank with 25% concealment: 25% * 0.9 = 22.5%, i.e. 2.5% absolute, not 10%.
With view range 439m: (439m – 50m) * (1 – 0.225) + 50m = 351m, not 380.65m.
Similarly with the foliage concealment, assume a moving enemy hides behind a bush that gives an extra +50%…
- 50% concealed EBR becomes: 50% * (1-0.15) + 50% * (1 – 0.1) = 87.5%, i.e. 12.5% absolute concealment reduction (not 25%).
With view range 439m: (439m – 50m) * (1 – 0.875) + 50m = 99m - 25% concealed Med Tank: 50% * 0.85 + 25% * 0.9 = 65%, i.e. 10% absolute (not 25%)
With view range 439m: (439m – 50m) * (1 – 0.65) + 50m = 186m
Comparing it to Optics
Optics is also relative (multiplicative), but it's easier to digest. It applies to the view range of your vehicle. Say, your tank has 439m view range
You'll see a 50% concealed moving EBR in
- With no equipment: (439m – 50m) * (1 – 0.5) + 50m = 245m
- With Optics: (439m*1.1 – 50m) * (1 – 0.5) + 50m = 267m
- With Comm's VS: (439m – 50m) * (1 – 0.45) + 50m = 264m
You'll see a 25% concealed moving MT in
- With no equipment: (439m – 50m) * (1 – 0.25) + 50m = 342m
- With Optics: (439m*1.1 – 50m) * (1 – 0.25) + 50m = 375m
- With Comm's VS: (439m – 50m) * (1 – 0.225) + 50m = 351m
Summary
Thus, this equipment is 2x – 10x less useful than many would expect reading the equipment description. It's main use is to counter well concealed LTs like EBRs and ELC-90, especially on
Look at the computation below, d(Opt / CVS) in meters tells you when Comms SV is better than Optics.
Thanks to
Note: looks like there is a typo in his vid, with Optics an enemy MT behind the bushes should have different final concealment when moving vs while stationary.