Joe wrote:
Dead Reckoning

While beating into the wind you plot a series of course lines.

You cover 80 miles and plot 35 course lines.

How do you find a single equivalent course and distance?
take your point of departure and your most recent fix and connect them
with a line called the course made good or CMG.
What is that called?
CMG
What tables do you use?
??The chart table.
How do you account for Set?
You don't.
How do you account for Drift?
You don't.

If you wanted to use a landmark like a water tower 8 mi to the east of
your departure point as a departure how do you account for that.

Joe

Wierd queston. Not sure I get what you want. (I am confident that if I
understood what you want I could tell you.)