Advanced Intel (BTD6)

"Allows long range targeting of Bloons in radius of your other towers."

- BTD6 descrpition

Advanced Intel is the second upgrade of Path 1 for the Monkey Sub in BTD6. It gives the Monkey Sub with extended range by allowing its darts to target all bloons within the radius of any tower on screen, not including Line of Sight restrictions of the dart attack. This includes popping Camo Bloons within the range of any tower that can detect camo with its base attacks. As for Ballistic Missiles, they will also follow Advanced Intel rules, detecting bloons within range of any tower on screen, including Camo Bloons if within range of any camo-detecting tower.

It costs $425 on Easy, $500 on Medium, $540 on Hard, and $600 on Impoppable.

Description
All Monkey Subs with this upgrade except for Pre-Emptive Strike and Sub Commander carry a pair of binoculars with green lenses. All Subs below Tier 5 except Armor Piercing Darts will directly hold them up towards their eyes, although the sailor for Armor Piercing Darts will simply leave its binoculars on its right hand. In addition, the Sub's hat will turn green, just as it does with Longer Range, its previous upgrade.

Advanced Intel Range
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 ONLY if there is at least one other Camo-detecting tower whose range covers at least a section of the track. As a result, this also means a non-qualifying camo range source will still not count as camo range even if the Sub has direct camo detection via Radar Scanner.

The following towers will grant extra range for the Advanced Intel.

Summary
Advanced Intel is a powerful range upgrade that boosts the Monkey Sub's potential to attack anywhere on screen. While it appears cheap later on in the game, it is quite expensive compared to other range-only upgrades in the game, but its greatest value comes from the addition of other towers with high range and/or natural camo detection.

Tips

 * Filling the map with 0-0-2 Darts across all areas of the bloon track can be used to let Advanced Intel cover most of the camo range for Monkey Subs with Advanced Intel. On water-heavy maps, 0-0-2 Buccaneers fulfill a similar role.
 * The highest range-per-dollar goes to the 0-0-0 Glue Gunner, at 46 range for $275 on Medium, but 0-0-2 Darts have the highest range-per-dollar as camo range, at 48 range for $490 on Medium.
 * Place the first Intel Subs not too far from the bloon track, because darts will take some time to move towards the bloons on the bloon track. Placing an Intel Sub away from the bloon track is still desirable though, so that dart attacks will less likely be obstructed by other area(s) of the bloon track.

Trivia

 * Advanced Intel is the only upgrade in the entire game that utilizes the concept of attacking only within range of other towers alongside its own range.