In maritime navigation, what does the term "dead reckoning" refer to?

"Dead reckoning" refers to the process of calculating a vessel's current position using a previously determined position as a starting point. This method takes into account the vessel's speed, course, and the time that has elapsed since the last known position was established. Navigators use this technique to estimate their current location, making adjustments for factors such as wind and current, which can affect the vessel's actual path. The accuracy of dead reckoning can decrease over time due to these variable factors, but it remains a fundamental navigation technique, especially when other methods like celestial navigation or GPS are unavailable. Understanding this foundational concept is critical for midshipmen as they develop their navigational skills.