Problem with sonar is that it counts everything that passes; doesn't ID fish. We rarely have a 100% clean passage.

Again, way back when, dealers were required to report sales rapidly. WDF had samplers who examined and summarized tickets daily. We had 95 (goal) to 99% of a day's catch within 3 days of the fishery. Co-management has allowed that to slip to where I saw some fisheries unreported months after they occurred.

But, managing by auto-pilot is cheaper, requires fewer changes, etc.