FWIW.......I have the Lowrance Mark 4 /FF/Chartplotter/GPS unit on my ski, and for the $200 it cost I am very pleased with it, I can mark crappie in brush, I can mark Hybrids in or around a school of bait, I can mark spots, I can mark trails and routes and send them to an SD card to use in other units...it has a trip logger that gives distance , top speed, average speed, and leaves a trail to follow back if needed.....
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