UAVs have been widely used in industrial inspection, remote sensing for mapping and surveying, search and rescue, and so on. Nevertheless, the limited autonomous navigation capability severely hampers the application of UAVs in complex environments, such as GPS-denied areas Eyeways patented technology enable fully autonomous navigation, using the drones camera alone. No GPS or other external signals required. Indoor and Outdoor Day and night operation Eyeways technology provides positioning accuracy that improves linearly with proximity. It is thus best (centimeter) when it is most needed, for example near the flare tip, near oil tank walls, near landing spot,etc.Advantages: Autonomous operation: vision-based navigation using a drones on-board camera allows fully autonomous inspection missions. No dependency on GPS or other external RF signals Repeatability: Each scan mission covers the very same regions of interest, and provides the very same view of the area as previous scans. Safety: position accuracy improves as the drone gets nearer to the inspected surface. For example: 10 meters from the inspected surface, the accuracy is better than 25 cm (2.5%). At 1 meter the position accuracy is 2.5 cm, providing safe navigation when close to the inspected objects. Day and night operation