Ukrainian drone operators from the 9th Battalion “Kairos” of the 414th Separate Brigade “Ptakha Madyara” struck a rare Russian radar system in Crimea. The “Nadgrobie” (64N6) radar is a mobile, three-coordinate, all-around surveillance system and serves as the “eyes” for the S-300PM and S-400 air defense systems. The estimated cost of a single system is around $5 million.