Using the assumption about the sun sweeping out equal arcs in equal time intervals, I then divided the semicircle into twelve equal segments to allow for the time period during which it would go from due east to due west position. Not having a compass or other instrument to segment the semicircle equally, I did my best to divide the 180 degrees in half into two equal ninety degree segments. I then divided the two ninety degree segments in half into two equal forty-five degree segments. Finally, I trisected (divided in three) each of the four forty-five degree segments to obtain twelve equal fifteen degree segments. Having done this, I was left with thirteen radii (one more than the number of segments) or ?�spokes?�on my semicircle, starting with 6:00 AM and ending with 6:00 PM. Each of these radial spokes would represent an hour on the face of the semicircle. At last, I had my crude sundial.

While basking in the sun, there I am looking up at this star and lining up its position with one of the spokes on my sundial. Ah, the sun is pointing right at the spoke corresponding to 1:00 PM. I look at my watch, and lo and behold, it?�s 1:05 PM! (Of course this has to be approximate because of the method used. You didn?�t think I could construct a perpetual motion Rolex in the sand, did you?)

Yet after testing time and time again, this crude construct works consistently. To be able to tell time based on nothing other than a crude construct in the sand, and to be able to do this within plus or minus ten minutes of the actual time, is, I would think, quite a feat?�especially in this day of jaded excessiveness. Try it out and let me know your experience. Bear in mind, you might have to tweak the location of the spokes, or hour hands on the sundial depending on your exact location; however, using the basic assumptions made here, you should prove a marvel to your friends and family at the beach. And what a great way to spend real quality time with the kids on the sand. Until next time......