[TEC] IRAI question

Hello modders and all captains, i read in some post, where DarkWraith wrote that he can't get real AI, becouse, at the begin of the war destroyers was poor and after become much stronger, so he is put settings to IRAI with hard difficulty. I'm not a modder, but i can redact the file sim.cfg. So the question is what settings will be optimize for real destroyers behavior in the begin of the war? I don't wan't poor destroyers, but i want behavior close to reality, in any case in next years i can adjust settings, and destroyers will be strong as much as in reality. There are the few parameters, that i don't very good understand (though there are explanations). For example, sensivity in OM for sh 4 is 0.01 and here 1 anywere. As i can imagine, more sensivity - more reaction, stronger sonar, hydro and other. But what those numbers mean?

For example, for hydro:

[Hydrophone]
Detection time=3.0 ;[s]
; lower values then 1 make it harder for AI to detect you
Sensitivity=0.9 ;(0..1)
Height factor=0 ;[m]
Waves factor=0.75 ;[>=0]
Speed factor=16 ;[kt]
;1 is on the deaf side
;0.10 is on the uber end
Noise factor=0.325 ;[>=0] was 1.3, decreased by 74.5%
Thermal Layer Signal Attenuation=1.45 ;[>0], 1 means no signal reduction, 3 equals signal reduction to 33% was 3.0, decreased by 55%
Min Signal Strength=0.125