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Humminbird HELIX7 CHIRP SI GPS G4 vdo ajax({ url: '/gp/bia/external/bia-hcb-ajax-handlerHumminbird Helix 7 G4 CHIRP SI GPS Model: 411920 1 Keypad control: Master HELIX at the touch of a button. Access the pre loaded views from the user friendly menu system, operated by softkey controls that allow you to reliably operate your fish finder in any conditions. CHIRP Side Imaging: Filter out noise and clutter for a clearer view of the world below and out to each side of your boat. CHIRP Digital Sonar processing of Side Imaging sonar means that