edit: Whops. Just realized theyre talking about the US. Disregard my comment. I'm not entirely sure what OP is talking about, but I think they use a system cal

edit: Whops. Just realized theyre talking about the US. Disregard my comment. I'm not entirely sure what OP is talking about, but I think they use a system called SCATS.[0] Looks like the system is actually pretty widely used in some other countries as well. [0] https://www.scats.nsw.gov.au/solutions/products https://www.scats.nsw.gov.au/solutions/products