NILBasser Posted January 27, 2010 Posted January 27, 2010 Can anyone hear tell me the differences between the two? Are there any major drawbacks to an external puck? This will be my first GPS unit and am getting overwhelmed with all the possibilities. These two I have found for what I think are good prices. Quote
Aluma-Bass Posted January 27, 2010 Posted January 27, 2010 wayne p. knows his electronics...he should chime in and help ya on this im sure Quote
Tpayneful Posted January 28, 2010 Posted January 28, 2010 917c External 16 Channel GPS antenna 7" screen 480x800 resolution 2000 waypoints Unimap Navionics Premium Capable 957c 8" screen 480x800 resolution 3000 waypoints Unimap Navionics Premium Capable or Navionics Platnum Capable Looks like a bigger screen, more waypoints and can run Navionics Premium. If it was me, I would spend the cash on a 798c SI or 898c SI instead. I have a 798c SI and Side Imaging is THE BOMB! Quote
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