How about view related delay for icons?
When you are looking to certain view for instance back-view, it takes certain time or delay before the icon pops up depending on range. So, for 6k con it takes maybe 10 seconds before the icon pops up and for 1 k con maybe 2 s
Of course a longer delay should be implemented before the icon disappears again.
So, the target is: con have to spotted and eye followed before it is tagged.
Also icon range should be dynamic depending on light, clouds, on the deck etc.