Comment by lesuorac

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-...