PSC provides quite a bit of good information. Especially following the Fraser Panel in-season. You can get an idea how a large run of fish (tens of millions in some years) can be forecast, monitored, updated, shared across two nations, tribes, and still put some fish on the grounds. In the course of a season (the fisheries are primarily commercial/subsistence) they will monitor troll, purse seine, gill net, dip net fisheries and get stock compositions from AK to WA to BC. It can be done.