Overwatch - A plane which watch's over enemy's, from a various kill streak you may use the "Overwatch"
What it does? - In your rader enemy's will appear only if the "Overwatch is in used" indicating where the enemy's are in the map.
Why i choose this? I choose this because i get tired of searching the map of enemy's even if i have a high kill streak, sometimes i even want the enemy's to have the "Overwatch" so they could come.