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Hanna's Commander PSI Arch is the first of its kind -- a profiling high-pressure arch. This arch uses five multi-axis spray heads -- two on each side (one low and one midway up) and one top head -- that rotate to wash the front and back end of each vehicle. The arch achieves high-level precision with the Hannamotion TM Vehicle Profiling System -- a combination of unique vehicle sensing devices plus kinematic motion profiling that create a three-dimensional mapping process. This process identifies the outline of a vehicle and washes only the vehicle's surface using multi-axis spray heads. Each of the five heads has independent controls to profile the height, width and distance from the surface. The system uses a side-to-side panning motion to get coverage on the front end of the vehicle and a diagonal or vertical-tilt motion to wash the sides and rear. Then, the spray flips around and begins the desired motion across the back.