In the late 70s laser technology was made available to the market, which permitted focused and very bright linear light beams. This allows for, even at distances of several hundred meters, a powerful light beam that is readable yet very small. The use of a particular rotating crystal pentaprism, which brings out the incoming laser beam at exactly 90°, creates a 360° reference plane. The receiving system picks up the signal and, through leveling, reproduces the plane created by the laser transmitter onto the ground. The latter is placed on a tripod at a height above the tractor cab, so there are no obstacles between the transmitter and the laser receiver. Modern laser transmitters are self-leveling, as they automatically find the horizontal plane. You can also set floors with 1 or 2 slopes, and the laser beam can control the machines up to a distance of approximately 650 meters. MARA does not produce the laser transmitter, but the MARA levelers work with all systems on the market.