That is what we used to determine the freakish speed of the current here. It was purely out of curiosity, but it was fun to find out. First, we made some calculations. Then, we started to test. We used the stopwatch on my wrist watch to measure the amount of time it took for the stale golden graham to get from bow to stern. As it is hard to determine exactly when the golden graham passed the stern, and it is impossible to make it land directly at the bow, we did several tests and determined the average amount of time it took. We used the spreadsheet program to find the average, and then used our calculations in the spreadsheet to find the speed of the current (it was about 1.2 knots).
--By RigelSent via BlackBerry by AT&T