this is just my opinion,,,,,.......to me its in-acurate in certain conditions........i could be wrong but doesnt gps measure mph by distance over time?????? if this is how it works then there is an issue with that.... if water is choppy/ wavy/ wouldnt it measure those and tell you that your going further in a shorter time which would show greater mph??? we had a guy out here last year running gps in his sled across a snow covered lake......his gps said consistantly 118 mph top speed... thing wouldnt break 96 mph on the radar guns..... just my opinion,,,,,,dont like gps
alden
The problem with the RADAR gun, is the thing you are measuring the speed of has to be going directly at you, or directly away from you, to get an accurate reading. Otherwise you will get a slower than actual reading on the radar gun. With GPS, it does not matter which direction you are going.
Yes, GPS can measure altitude if it gets four satellites...but in the context you are putting it, the waves would have to be 10 feet tall to make a difference. The boat skimming across the tops of the waves is not going to make a difference.
Ever see that show where they pointed a RADAR gun at a tree and it was going something like 90 MPH (can't remember th e actual speed)??
I have some of those trees up here for sale
Sean