POV: HOW TO CALCULATE ETA FOR DEAD RECKONING Dead Reckoning or DR as it is usually referred, is the process by which one’s current position is calculated based on/using a previously obtained position. A previously determined position can also be termed as a fix; the estimated speed and the course are applied to that fix to obtain a DR. But for this example, DR is the method of calculating the position of the vessel that enables us to calculate an estimated position for the FUTURE wherein we may