Optical apparatus and instruments, namely, cameras for visual simultaneous localization and mapping (VSLAM), and infrared cameras for visual simultaneous localization and mapping (VSLAM); light detection and ranging apparatus, namely, lidar apparatus; radar machines and apparatus; ultrasonic sensors; lasers for measuring; antennas; global positioning system (GPS) receivers; rechargeable batteries; aeronautical radio communication machines and apparatus; precision measuring machines and instru...