Sodern has introduced the Astradia, a daytime star tracker designed to enhance navigation systems in environments where GNSS (Global Navigation Satellite System) signals are unavailable. This device works in tandem with inertial navigation systems, providing orientation information based on stellar positions. Although the technology promises reliable navigation even in challenging conditions, it has prompted discussions about its efficiency and practicality, especially regarding its weight (3 kg) and cost. Some commenters suggest alternatives like using barometric data and topographical models for improved navigation accuracy without reliance on this device. The discussions also include consideration of potentially placing optical navigation beacons in space to enhance the system further. Overall, while Astradia presents a potential solution for specific scenarios, its usefulness is debated within the context of more efficient existing technologies.