Control system for horizontal directional drill

Abstract

A control system for a horizontal directional drill includes a user interface, a locator tool, and a controller. The user interface has a first display and a second display. The locator tool measures the rotational position of a drill head of the horizontal directional drill. The controller determines an estimated rotational position of the drill head. The first display is in communication with the locator tool and displays information about the measured rotational position of the drill head. The second display is in communication with the controller and displays information about the estimated rotational position of the drill head. The control system includes means for calibrating the estimated rotational position of the drill head to substantially match the measured rotational position of the drill head.

Dependencies are inferred from the claim text.