Scanstrut - LMM-1 Self Leveling Radar Mount - LMM-1. Our Mast Leveller features a fine-tuned hydraulic damping system that reacts to major changes in the heel angle of the boat. No power is required. Designed to fit the most up-to-date radars from Garmin, Raymarine Lowrance and B & G.. Our Self-Levelling Mast Mount ensures your radar stays level with the horizon at all times for optimum antenna performance. As the boat heels or rolls, the radar is kept horizontal preventing target loss and givin