What does "dead reckoning" refer to in the context of E-NAV?

In the context of electronic navigation, "dead reckoning" refers to a method for estimating the current position based on a previous known position. This technique involves using the last known position and applying factors such as speed, course, and the time elapsed since that position was recorded. By continuously updating the estimated position with these details, navigators can approximate where the vessel currently is, even in the absence of visual cues or GPS signals.

Dead reckoning is especially useful in conditions where other means of navigation may be unavailable or unreliable, such as during inclement weather or when navigating in areas with limited satellite coverage. It relies on the accuracy of the initial position and subsequent estimates of movement, making it an essential practice for safe navigation.