I think it's been identified correctly you were trying to use the TBT (UZO) to designate and get close to the smoking targets. Use F5, then TAB which brings up the binoc graphics and your zoom controls will work. Best to get next to the targets at lowest zoom. However, the UZO can help you identify smoke targets that are further away. Once you have identified the direction, use the binocs and move there.
-Pv-
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