Applied Physics Systems has been a supplier of Wireline Steering Tools, directional sensors and drilling systems to the HDD industry for more than 15 years that have become the standard for reliability and long-term service in the industry. As a technology-based company we always strive to provide the newest most innovative solutions while keeping the scope of our products (and their cost) within the budgets required to profitably operate in the HDD industry. Our HDD product line includes traditional Wireline Steering Tools complete with surface systems and a wireless EM based HDD system that requires no wireline to communicate sensor information to the surface. Both wired and wireless systems can be used with AC or DC coil-based location systems to determine the exact probe location.