- Manufactured by PSL
- Has on-board sensors and navigation package for depth (by pressure), tilt, x and y position, theta (rotation), drill water temperature, hole water temperature, hole diameter, sensor cavity temperature and pressure, acceleration, load (drill head and weight stack)
- Weight stack and nozzle are approx. 75 ft in length and consists of 6 coupled sections. Each section is insulated. The bottom-most section is tapered.
- Each unit weighs approx. 1100 lb. (drill head only). The weight stack altogether weighs another 900 lb.