It is incorrect to say that traditional methods of dead reckoning are no longer used since this is exactly what most modern inertial navigation systems depend on, except they do it electronically. However, tracking the DR the old fashioned way is a very simple system that doesn't rely on any electronics or external input. With it you can quickly determine your current location by plotting your course and speed from a previously known location. It can also be used to determine your future position by projecting your current course and speed from your current position. DR positions should be plotted at regular intervals depending on the nature of the passage. They should be updated between corrections and changes in course or speed. Of course it is important to remember that any direct calculation position, whether performed electronically or manually, is only an approximation as it takes into account tidal or offset effects. But by manually tracking the DR, as well as fixing your location with GPS, you'll have a much better idea of ​​where you are and what you're doing. are progressingIn m...