“Precisely balanced gyroscopes supplanted the magnetic compass as a direction finder, enabled aircraft to fly straight and level, and led to inertial navigational systems that could guide submarines beneath the North Pole or drop hydrogen bombs on Moscow.” — Hiawatha Bray Copy Share Image
“Precisely balanced gyroscopes supplanted the magnetic compass as a direction finder, enabled aircraft to fly straight and level, and led to inertial navigational systems… — Hiawatha Bray Copy Share Image
