The Soryu/Hiryu pairing rested on the belief that elite training could overcome an instinctive control response. With a pilot's right hand on the stick, pushing away from danger tends to turn an aircraft away from a conventional starboard island. A port-side island reversed that relationship, while mirror operations promised to let two carriers steam close together with their islands inward and aircraft working outboard. Pilots could move between air groups, so the scheme also required them to switch deck-layout reflexes rather than master one consistent emergency response. The surviving accident evidence needs careful handling: equal accident totals would not establish equal numbers of fatal accidents. The unusual deck arrangement therefore becomes a wider human-factors lesson, because warship design has to account for what crews do under stress rather than what a system assumes they ought to do.
Chapter · 1:00-9:20
Mirror carriers, pilot instinct, and port-island risk
Soryu and Hiryu's mirror layout shows why carrier design could not safely assume that training would erase a pilot's instinctive response near the island.