Signal Flare

"Camo Bloons popped by this tower permanently lose their camo status, and can be attacked by towers without camo detection."

- Official Description

 is the third upgrade on the second path for the Mortar Tower in Bloons TD 5. It allows the Mortar Tower to detect and attack Camo Bloons. In Bloons TD 5, the Mortar Tower cannot target camo bloons without this upgrade. After being struck by with this upgrade, the bloon loses its camo status and turns back into a normal or Regen Bloon (depending on its initial status). Towers without camo detection can attack the once-camo or once camo-regen bloons.

Trivia

 * This upgrade and the unupgraded Mortar Tower have the Monkeys fingers in it's ears.
 * This upgrade was the only upgrade that removes Camo bloon status from bloons, until the Monkey Engineer's Cleansing Foam upgrade in Bloons Tower Defense 5 Deluxe, and the Tier 4 upgrade for the Ice Fortress in Bloons TD 5 iOS.