I like what you said the first time better, before you edited it.Originally Posted by Emaginashun
Don't put too much faith in your professors. When you graduate, you'll really begin learning a thing or two.
The point of interest to boaters is how fast a boat is capable of moving through water - UNAIDED. Follow me?
No one is arguing the results that a GPS provides.
It does one thing and one thing only, regardless if you're walking with one or have one mounted in an aircraft or boat. We are all clear on what it does. It provides your position, and calculates speed based on a delta position over a given period of time. We're all clear on that, no need to further explain it professor.
The point is, that the speed shown by a GPS is that with which you traverse distances, and that is of less importance to boaters, than knowing how fast you move through water. Thus, it is of no wonder that any official record is conducted using the average of two passes in opposing directions. Why?.....Because, in order to measure speed through water, you have to eliminate the fact that the water may be moving, and the wind may also be affecting your results.
I don't know about you, but when I'm in an area where the water is really moving, locally for instance I know of a shallow cut that can flow water at about 5 mph...When I look at the GPS and it tells me, I'm going 5mph faster than I've ever gone before, I don't start jumping for joy, or have the right to say my 80mph boat does 85, because my GPS said so.