UAS online magazine reports that the U.S Naval Research Laboratory at Pennsylvania State University successfully completed testing of cooperative autonomous soaring algorithms used to keep sail planes a loft for a sustained flight.

During the weeks of Sept. 28 and Oct. 26 last year, the team launched 23 flights, resulting in more than 30 hours of combined flight time. The tests were conducted within restricted airspace at Phillips Army Airfield, Aberdeen Proving Grounds. The tests concluded with two powered sailplanes sharing telemetry data and cooperatively and autonomously soaring at altitudes of more than one kilometer and for flight durations of more than five hours, the U.S. Naval Research Laboratory news release said.