The scenario is that you are in a fleet and you know the enemy is approaching, or you are approaching them. Scouts are reporting positions, numbers, fleet composition and all the usual details. How can you tell what their optimal range is likely to be before you get on grid? Is it just a guess?
The type of tank should be easily guessable from the type of logistics ships and type of combat ships, but if you can't tell what range they are likely to want to fight at then you might get completely obliterated such as the recent eVoke vs. R.A.G.E. battle.