Oxford Technical Solutions has released the xNAV650, the latest in its line of inertial navigation systems (INS), suitable for use on drones. INS provide surveyors with absolute position, timing and inertial measurements (heading and pitch/roll) that they can integrate into their survey projects. The measurements, when combined with data from other devices (such as lidar sensors and cameras), can greatly enhance the surveying process, leading to a greater return on investment, according to the company.