Radar's ability to spot something falls off with the 4th power of the distance to it, and a 1940-tech radar spotted the IJN's attack wave 45 minutes before it h

Radar's ability to spot something falls off with the 4th power of the distance to it, and a 1940-tech radar spotted the IJN's attack wave 45 minutes before it hit Pearl Harbor. Do the math, or (for example): https://www.defensenews.com/global/europe/2025/09/24/dutch-radar-firm-robin-turns-bird-spotting-skills-into-drone-defense/ https://www.defensenews.com/global/europe/2025/09/24/dutch-r... (Earlier coverage characterized the drones DoS'ing the Danish airports as "large". That's vague - but DoS'ing a major airport for hours requires drone(s) that get noticed, not a couple robo-pigeons.