Tracer Products has introduced the Tracerline® Marksman™ ultrasonic diagnostic tool, a highly accurate instrument that converts and amplifies inaudible ultrasonic sound into audible "natural" sound. Now, service technicians can easily hear sounds that signify problems such as air brake leaks, gear and bearing wear, as well as vacuum, EVAP system, exhaust, refrigerant and passenger compartment leaks. This allows technicians to repair them long before they become major headaches.