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. Advanced Intel effectively gives the sub an almost unlimited range, as it can fire into other towers' radius. It costs $425 on Easy, $500 on Medium, $540 on Hard and $600 on Impoppable.
Advanced Intel will only be useful if there is at least one other tower with range covering the track. Advanced Intel will also be able to target Camo Bloons if there is another tower that is able to pop Camo bloons. However, Advanced Intel cannot hit camo bloons itself if no other tower can, and it can only attack camo bloons ONLY if there is at least one other camo-detecting tower whose range covers at least a section of the track.
The following towers will grant extra range for the Advanced Intel.
Medium-small range. Other Advanced Intels cannot be used as camo detection range, except if such towers have camo detection themselves, such as with a Radar Scanner. Subs must be submerged to be camo detection range.
Placing a Dartling Gun on the map will NOT provide unlimited range and camo detection for all Monkey Subs with Advanced Intel, regardless of where the cursor is currently pointing. This also applies to Sniper Monkeys, Mortar Monkeys and Aircraft Carriers. However, Advanced Intel Subs can detect camos and shoot within the towers' own given radius.