Jim,
I am not troubled by waves and swell at all, and I run my machine quite "hot". I can be in water that is waist deep, and a gentle swell wave that passes above my chest will not generate any significant falsing.
Generally, I will pick my time that minimises rough conditions (lowish tides/off-shore summer winds,etc).
Having said that, if I know I am going to hunt in less than ideal conditions, a setting of REJECT around 13uS-15uS and SAT at medium allows for a smooth threshold in water at neck deep, and with swell/waves passing through my hunt area.
Even these "generous" settings, you will NOT miss the gold targets. I will still pick up small gold ear-rings/studs as well as larger gold rings at depths that sometimes I struggle to dig down to.
I'm confident the circuitry that Eric uses in his PI machines are superior to other PI detectors on the market, as well as the superbly designed/constructed coils, which all too often, don't receive the praise they deserve.
I guess like any machine, it's knowing what settings you can get away with to achieve the best performance in a given area....and with the Goldquest, well, it's just all too easy. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt="

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Let me know if you need any further information.
Tony. <IMG SRC="/metal/html/ausflag.jpg" BORDER=0 width=32 height=17 ALT="au~">