Sensors and gauges - Observability in distributed systems

Imagine a world where a pilot would have to fly an over 500-ton, 4-engined Airbus A380 with virtually no flight instruments, only a primitive joystick and maybe a headlight for night landings. Imagine a captain navigating through a coral reef full of underwater ridges, or maneuvering beneath the polar ice sheet, all while commanding a submarine without sonar and basic instruments. Imagine a…