A dead reckoning shows the position the vessel would be at given ______.

A dead reckoning shows the position the vessel would be at given ______.

• A. An Assumed Speed and Known Time of Run
• B. Actual Speed and Current Time
• C. Wind Direction
• D. Distance to Land

Answer: (A)

Dead reckoning estimates where you are by projecting from the last fix along your course for a set amount of time using an assumed speed. The distance you travel is the assumed speed multiplied by the elapsed time, and you plot that distance along the intended course. External factors like wind and currents aren’t included in the basic DR calculation, so you don’t use actual speed or wind direction to determine the DR position. Distance to land isn’t part of how you compute the DR line; it’s a separate reference check. So the position given by an assumed speed and a known time of run is the one DR provides.

Dead reckoning estimates where you are by projecting from the last fix along your course for a set amount of time using an assumed speed. The distance you travel is the assumed speed multiplied by the elapsed time, and you plot that distance along the intended course. External factors like wind and currents aren’t included in the basic DR calculation, so you don’t use actual speed or wind direction to determine the DR position. Distance to land isn’t part of how you compute the DR line; it’s a separate reference check. So the position given by an assumed speed and a known time of run is the one DR provides.