Ключевые слова: abstract, air, airplane, army, background, circle, computer, concept, control, danger, defense, design, detect, detection, digital, display, equipment, flying, futuristic, graphic, green, hud, icon, interface, map, military, monitor, navigation, object, protection, radar, safety, scan, scanner, scanning, screen, search, sight, signal, sonar, submarine, symbol, system, target, technology, traffic, vision, visual, war, weapon,