<?xml version="1.0" encoding="UTF-8"?><urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:news="http://www.google.com/schemas/sitemap-news/0.9"><url><loc>https://circuitdigest.com/news/students-built-a-submarine-to-map-ice-thickness-across-frozen-lakes-and-somehow</loc><news:news><news:publication><news:name>CircuitDigest</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-08-17T17:43:41+05:30</news:publication_date><news:title>Students Built a Submarine to Map Ice Thickness Across Frozen Lakes and Somehow Made GPS Work Underwater</news:title></news:news></url><url><loc>https://circuitdigest.com/news/a-drone-that-tracks-its-leader-using-four-microphones-and-an-esp32-no-gps-or-cam</loc><news:news><news:publication><news:name>CircuitDigest</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-08-17T14:59:13+05:30</news:publication_date><news:title>A Drone That Tracks Its Leader Using Four Microphones and an ESP32, No GPS or Camera Needed</news:title></news:news></url></urlset>