This underground unit simplifies jobsite setup with a fully articulated, self-supported 3-axis boom capable of performing a wide horizontal swing arc (greater than 50 degrees left/right), 90 degree vertical arc (up/down), 24-inch telescoping (in/out) with a sheave head that swivels approximately 60 degrees as well, allowing for approximately 10 degree adjustments within this range. The short length also makes setup easy.