With its huge radar dome executing a full rotation every 10 seconds, an E-3A aircraft flying at an altitude of 9,150 m can monitor an area of more than 312,000 sq km. Three E-3As with overlapping orbits can cover the entire area of Central Europe. An E-3A can detect low-flying targets within 400 km or 215 nautical miles, and medium-altitude targets within 520 km or 280 nautical miles. | NATO Allied Air Command