Well, the current puck still has emitters inside of it. > [1] Puck and Player Tracking became fully operational in 2021-22, with up to 20 cameras in each arena

Well, the current puck still has emitters inside of it. > [1] Puck and Player Tracking became fully operational in 2021-22, with up to 20 cameras in each arena and infrared emitters in each puck and sweater. The player tracking is fairly easy to see; there's often an airtag sized bump on a player's jersey. The puck tracking can be a bit more difficult but sometimes the puck looks like it's melting the ice behind it. That's just them giving it a grey shadow instead of the neon shadow. [1]: https://www.nhl.com/news/nhl-edge-launches-website-for-puck-and-player-tracking-data https://www.nhl.com/news/nhl-edge-launches-website-for-puck-...