The EP-3E ARIES II (Airborne Reconnaissance Integrated Electronic System II) is the U.S. Navy's only land-based signals intelligence (SIGINT) reconnaissance aircraft. They are based on the P-3 Orion airframe and provide fleet and theater commanders worldwide with near real-time tactical SIGINT. With sensitive receivers and high-gain dish antennas, the EP-3E exploits a wide range of electronic emissions from deep within targeted territory.