The sole watchkeeper was navigating using a track control system that had been fitted in December 1998 and had been used extensively since. The system interfaced a Global Positioning System (GPS) navigator with the autopilot and enabled the autopilot to steer so as to maintain the vessel on a selected track. ... The watchkeeper did not understand how the interface functioned, and tried to alter course using the autopilot's course setting knob while the interface was connected. The system did not allow it. ... However, in broad terms, the grounding occurred due to poor navigational management and an over-reliance on the automatic track control system. ... Owners and skippers are reminded that a track control system, unlike a video plotter or positions plotted on a chart, does not give a continuous visual indication of the vessel's position relative to the required track. It is essential to establish that clear water exists between the vessel's start position and the waypoint to which it is heading. While on passage and being steered automatically, the vessel's actual position must be checked by some reliable alternative means to ensure the projected track is safe. ... Track control systems should never be used in confined waters or when operating in close company of other vessels. A track control system will relieve the watchkeeper of certain routine tasks, but NEVER his primary responsibility of maintaining a proper lookout.
