Stealth fighters, also known as ninjas (6 letters), are military aircraft designed to be difficult to detect by radar. They are equipped with advanced avionics and low-observable features such as radar-absorbent materials and special coatings to reduce their visibility to enemy radar. Stealth fighters are used for a variety of missions, including reconnaissance, air-to-air combat, and ground attack. They are also used to penetrate heavily defended airspace and launch surprise attacks on enemy targets.