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Message: <blockquote data-quote="FuzzyGrub" data-source="post: 519785" data-attributes="member: 3438">We have a MG Xi3 with the Pinpoint GPS system.  We routinely fish close to bridge abutments, boulders, etc, with a good amount of current.  Low bridges can cause problems by blocking some of the satellites.  If you loose WAAS,  which is geosynchronous at the equator, accuracy is diminished significantly. The older HBs, like the generation I have, the internal gps was not that great.  I have added the external “puck” to all our boats.  Assuming the latest is much better, and there is a way to add distance and offset to where the FF is located, it might have better position data than the MK power drive, at least the older ones.</blockquote>