^
I knew that, Kathy. I'm also an instrument-rated private pilot. Early in my training I had to learn "dead reckoning" to fly to my destination plotting my course using visual checkpoints and flying a heading accounting for winds aloft direction and speed. If I planned the flight correctly, I would reach each checkpoint at the precisely calculated time. The same thing is done at sea and, in fact, this type of nautical navigation is called "piloting."
I learned that "dead reckoning" was derived from the term "deduced reckoning."
In instrument flight, Air Traffic Control vectors my flight to assigned altitudes and airways to get to my destination. Dead reckoning is not used in instrument flight.