Cloak Tracker - Creates particles on Cloaked enemy within 20m
UPGRADE II - Causes enemy Cloak to flicker after 7 seconds in radius
UPGRADE III - Causes enemy Cloak to flicker after 5 seconds in radius
From http://denkirson.xanga.com/742784256/crysis-2/
i read it
but i have another view in practice
all 3 lvl just indicates enemy for few seconds (3-5 or something) if he cloaked in 20 meters radius not matter you see him at the moment he is cloaking or not
the next lvl just increase the visibility intensity. MAY BE add 1 or 2 seconds of highlighting
that's ll
as for me, i think cloaking sound alert is much usefull then visual highlighting itself
you should use nanovisor anyway coz many invisible dudes sneak around with stealth improove and don't regen power often
RabidPhoenix: Thank you very much for nice web with correct description of perk! Maybe this perk is not epic fail, but useless to my game style.

Waiting 5 seconds for enemies to start to flicker, I would be dead 10 times..
no
the perk indicates recently cloaked enemy just after he cloaked for next 5 seconds
i think cloak tracker is an amazing perk it is one of the best in the game, crytek did amazing job with the creatitivy and imagination required to come up with such awesome stuff for crysis 2 thank u so much this is very mind blow game
what is your K\D rate man? =D