In situations where your unit makes a decision which is based on whether a unit is seen, it seems that the sequence is :
1 : Is enemy seen,
2 : Increment time,
3 : If answer to 1 was yes (and all other conditions are ok), carry out action.
(One example of this : say you have a commander 60 meters from an enemy grunt, and a sniper 70 meters from it at the end of a turn, so the enemy is sighted by the sniper but not the commander. Then say you move the sniper away from the enemy at the begining of the turn, so it immediately loses sight of the grunt and he dissapears from the screen, and you have given your commander an Op Fire command right on the enemy. Even though the enemy is not visable at all during the commander's fire order, he will still lock onto the enemy and track him for that 2 seconds, then fire if he has LoF at the appropriate time.
You may suggest that the sniper has LoS for a short while due to the theory that all units pause for a tiny time at the beginning of turns, but this also works with Greys if the enemy is only sighted due to a psyke.)
Hmm, I'm gonna need a pic or two. So, now say you give these orders :
And your opponent has units here (no orders) :
Then you would expect to target the grunt to the left. What happens is this :
Then this :
And that's it really. The worst case of this is with HQ's, because they are always sighted once you have sighted them for the first time. So unless you have some other units in the Op Fire order's arc of vision sighted just before the order begins, you will always target the HQ if you have LoF to it.
Edit : Added step three at the beginning of the post.
Edit 2 : Removed it because it didn't make sense. Just three steps.


































