Richard Harrison wrote:

Keith wrote:
"---does the reader believe the markings on the scale and think that it
is actually MEASURING the power in a forward and reverse wave?"

One only must measure a quantity proportional to watts then interpret
that accurately.

So true. But the quantities being measured are line volts and line amps
and neither is proportional to incident or reflected watts.

Much happens to the measured voltage and current before the result is
inaccurately interpreted as forward and reverse power.

....Keith