Advanced Intel

"Allows long range targeting of bloons that are in the radius of your other towers."

- Description from BTD 5 iOS

Advanced Intel is the 2nd upgrade along path 1 for the Monkey Sub. It enables the sub to target all bloons within the radius of any other tower. This also applies to camo bloons. This means that the sub can target camo bloons if they are in the radius of another tower that can so (for example, a Ninja Monkey). However, the sub cannot hit camo bloons itself if no other tower can. Advanced Intel also effectively gives the sub an almost unlimited range, as it can fire into other towers' radii.