# Serhii Beskrestnov Topic: [[Topics/Starlink/Starlink|Starlink]] · People in this topic are listed on the hub. - **Who:** Ukrainian electronic-warfare expert, call sign "Flash"; adviser to the defence minister since Jan 2026 (France 24), described by [CNBC](https://www.cnbc.com/2026/10/23/ukraine-says-starlink-restrictions-remain-despite-trump-assurances.html) as Zelensky's defense tech adviser. ## Role in this topic - On Russia's "Volna Kupol Garant" Starlink jammer: first spotted in Kharkiv region in 2024, up to a dozen seen, about $1.5M each ([France 24, Jul 3, 2026](https://www.france24.com/en/europe/20260703-ukraine-russia-faces-challenge-jamming-starlink)) ⚠️ (France 24 could not verify the model). See [[Topics/Starlink/Jamming and Resilience|Jamming and Resilience]]. - Oct 2026: said Ukraine is "physically unable" to use Starlink for long- and medium-range attack drones because terminals only work up to 70–90 km/h ([Reuters via Investing.com](https://www.investing.com/news/world-news/ukraine-says-starlink-and-starshield-operating-at-400-kph-after-week-of-throttling-4970757)).