Take cover is and action called take over that can be used when in a ranged attacked. certain actions or attack can trigger this action as well. It has been agreed that Cover will give a chance for a ranged attack to outright miss before the "to hit" check is made. Settled on the fallowing values.

1/4th cover = 10% chance
half(1/2) cover = 25% chance
3/4th cover = 40% chance
9/10th cover = 70% chance

Also agreed that crouching and going prone will automatically provide 1/2 and 3/4 cover, respectively. Crouching gives a +2 finesse to shooting, -2 agility, -1 speed. Prone gives +3 finesse to shooting, - 3 agility, -2 speed.