Quote Originally Posted by FAADAN View Post
GPS satellites have a small wobble, that, coupled with magnetic interference, frequency interference, weather iterference, reflective interference, etc. mean that there are limitations on their accurace. Even with WAAS, the accurace is only about two meters. Any manufacturer who claims more accuracy than that is exaggerating the ability of their unit. These are limitations of the satellite system, not the receivers we mount on our boats. Nothing these manufacturers do can fix the errors in the satellite system.
I think a lot of people are fooling themselves into thinking their GPS is spot on, every time. I've owned Garmin, Lowrance, and Hummingbird, with each one I've seen the coordinates move around with the unit sitting dead still. You can have the boat sitting on the bank, and the boat indicator icon is moving around on the lake map.
I think if folks did a little test, drop a marker buoy in the water, blind themselves to any outside visuals, only the GPS screen, then see how tight they can stay to a marker buoy. I can guarantee they ain't gonna stay tight enough to keep a jig from hanging in a brushpile, and probably not stay within a 10 foot radius.