In Dead Reckoning (DR), which parameters change based on the position on Earth's surface?

In Dead Reckoning (DR), the parameters that change based on the position on Earth's surface are latitude and longitude. Dead Reckoning is a navigation technique that involves calculating one's current position by advancing a previously determined position using known speeds, elapsed time, and course.

Latitude and longitude are the coordinate system used to determine exact positions on the Earth's surface, and they directly reflect the geographical location of a vessel. As a vessel moves, its position on the Earth's surface changes, leading to alterations in these coordinates. Thus, when navigating using dead reckoning, a navigator must account for changes in latitude and longitude to maintain an accurate course.

While bearing, angle, azimuth, altitude, speed, and course are important navigational parameters, they do not inherently change solely based on the position on the Earth's surface in the context of dead reckoning. Speed and course may influence how a position changes, but the actual coordinates themselves—latitude and longitude—are the primary parameters that reflect a vessel's position on Earth.