The Northrop Grumman MQ-4C Triton is an American high-altitude long endurance unmanned aerial vehicle (UAV) under development for the United States Navy as a surveillance aircraft. Together with its associated ground control station, it is an unmanned aircraft system (UAS). Developed under the "Broad Area Maritime Surveillance" (BAMS) program, the system is intended to provide real-time intelligence, surveillance and reconnaissance missions (ISR) over vast ocean and coastal regions, continuous maritime surveillance, conduct search and rescue missions, and to complement the Boeing P-8 Poseidon maritime patrol aircraft. Triton builds on elements of the RQ-4 Global Hawk; changes include reinforcements to the air frame and wing, de-icing systems, and lightning protection systems. These capabilities allow the aircraft to descend through cloud layers to gain a closer view of ships and other targets at sea when needed. The sensor suites allow ships to be tracked by gathering information on their speed, location, and classification.