be fielded in 2021 as part of an integrated functional capability (IFC) 4 configuration; further changes are planned for IFC 5 upgrade in 2024. Another aspect of the MQ-4C is its ability to act as a network relay and data fusion center, able to receive and transmit messages from around a theater of operations between various sources not within line-of-sight of each other. It can take what ships, planes, and land sensors are seeing and broadcasting through various data-links and fuse that information together to create a common "picture" of the battlespace, which it can rebroadcast. This capability greatly increases interoperability, situational awareness, targeting efficiency, and sensor picture clarity, while providing an alternative to satellite-based communications systems. Operational history Flight testing The MQ-4C Triton performed its first flight on 22 May 2013 from United States Air Force Plant 42 / Palmdale Regional Airport, California. The flight lasted 1 hour 20 minutes and the aircraft reached an altitude of 20,000 ft. On 6 January 2014, Northrop Grumman announced that the MQ-4C had completed 9 test flights with 46 hours of flight time. Half of its envelope expansion testing, which included evaluating the aircraft at different altitudes, speeds, and weights, had been completed. Some flights lasted over 9 hours and reached 50,000 ft. A second Triton aircraft was to fly by March or April 2014. Initial envelope expansion testing was completed in March 2014 through 13 flights, 81 flight hours, and reaching altitudes of 59,900 ft. On 18 September 2014, the Triton successfully conducted an 11-hour cross-country flight from Northrop Grumman's Palmdale, California facility to Naval Air Station Patuxent River in Maryland. The cross-country flight test had been previously postponed twice due to bad weather. The aircraft flew a pre-approved instrument route along the southern U.S. border, crossing the Gulf of Mexico and Florida, then was directed north along the Atlantic coast and up the Chesapeake Bay, a distance of at to avoid commercial air traffic. A test fleet of three Tritons completed 15 flights demonstrating speed and altitude capabilities prior to the transcontinental mission. With the completion of the cross-country flight, the MQ-4C program transitions from initial safety flight testing to validating its ability to perform operational missions over the ocean. Operations from Patuxent River in the coming weeks will test the aircraft's sensors, communications, interoperability, and expanded envelope flight coverage. The three test Tritons are scheduled to fly a total