У вашего броузера проблема в совместимости с HTML5
Lowrance DownScan Imaging vs. Garmin ClearVu.
One product has true downscan, one doesn’t.
Learn more: https://www.lowrance.com/lowrance/type/sonar--transducers/?utm_source=youtube.com&utm_medium=referral
Check out this video to see how hard it is to get an accurate picture of what’s under your boat when you don’t have a down-facing element in your transducer.