Satellite navigation systems, including GPS, are vital for accurate positioning and safe navigation at sea. Regular repair and service ensure these systems provide accurate data to prevent navigation errors. Service tasks include checking the receiver, antenna alignment, software updates, and system calibration. Proper maintenance helps extend the system’s life and ensures it complies with SOLAS requirements. A well-maintained satellite navigation system reduces the risk of collisions, improves situational awareness, and increases operational efficiency, providing the vessel with reliable positioning information during voyages.