The X36D from Bynav is a GNSS/INS combined navigation system with dual antennas for heading, based on self-developed GNSS chips. It features a full-temperature calibrated IMU compliant with ASIL B functional safety, a deeply-coupled combined navigation algorithm delivering 2 to 5 times better accuracy than loosely-coupled approaches, and the REAL GNSS positioning engine with integrity monitoring. With dual-antenna support, it provides reliable position and heading in challenging environments including underground parking, tunnels, overpasses, urban streets, and ports, with multiple interfaces for automotive integration.