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Thanks for the information. CHIRP sonar seems to be the in thing. Two questions:
1. Is the 5' screen on the Lowrance or any device display large enough?
2. The Dragonfly lists two different maps: CMAP or Navionics: difference? One better or worse? Also the two Dragonfly models have two different sceens 5.7" and 7": significasnt differences.
Lastly, is investing in sidevu technology worth the buck?
Craig