Slat armour is designed to defeat RPG's and in game terms, it gives HEAT protection where in many cases there wasn't any HEAT protection before .....like an M113
The only thing that slat armour might do on a Chally is
IMHO.. stop an RPG from messing up the Chobham which is
a HELL of a lot more expensive and rare in Ukraine than steel slats which are almost a dime a dozen
So it does serve a purpose just not one the game covers.....cheap armour protecting the expensive and hard-to-replace armour
A secondary purpose of that slat might be as a place to stuff foliage for camouflage
ALSO look at any photo of slat on other vehicles.
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There is a space/gap between the slat and the hull ( Like Schürzen in WW2 though it was there more to slow down AT rifle rounds)
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There is no gap on that photo of the Chally
