Now Hager is working to replace such federally-mandated observers with high-definition cameras affixed to fishing boat masts. From the safety of his office, Hager uses a laptop to watch hours of footage of crew members hauling the day’s catch aboard and measuring it with long sticks marked with thick black lines. And he’s able to zoom in on every fish to verify its size and species, noting whether it is kept or flung overboard in accordance with the law.