3D two-masted grader guidance solution with sensors. The Leica iCON iGG4 3D, blade-mounted two masts grader guidance system is the most productive solution, ensuring maximum speed and precision by reason of the efficient synergy at work between the two GNSS antennas and the set of sensors. Programmed to recognize the blade’s every movement, including the “blade tilt”, the system ensures a precise grading in all environments, including those with steep slopes The double-antenna configuration presents many advantages as compared to the single-mast GNSS. Independently from the position of the machine, the position of the blade is precisely calculated to ensure a precise and efficient grading. You can, therefore, execute tasks that seemed impossible before. Move along crab-like to create ditches and level off lateral slopes; let the iGG4 automatically control the grader’s blade and concentrate on keeping the machine in optimal position.