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The Humminbird 587ci HD Combo is a mid-cost fishfinder.

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Pros

easily removable to ensure that it doesn't get stolen

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images are very clear, can easily tell what's below

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covers a wide area in each sweep

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GPS is precise, offers good guidance for navigation

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detailed maps of a large number of lakes

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Cons

accumulates scratches if you don't purchase an additional cover

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quality control issues - some units ship with inactive sonar

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The Humminbird 587ci HD Combo is a mid-cost fishfinder. This fishfinder has most of the same specs as the higher cost 788ci HD Combo model, but without the 788ci HD Combo's Ethernet networking ability, which allows you to share views, transducers, GPS positions, and other aspects with other anglers. Features shared between the two models include Humminbird's Dual Beam Plus technology, which combines the accuracy of a twenty degree beam with the scope of a sixty degree beam. You can view these beams seperately, side by side, or combined (which provides the most complete picture). Another shared feature is Switchfire, which allows you to choose how results are displayed. When you need to see through rough waters, you can choose the Clear mode, which will show you only the fish and structure of the area. For more detail, turn on the Max mode, which will show you everything including thermoclines and water currents. The TrueArch technology of the Humminbird 587ci HD Combo utilizes parallel processing of sonar data to eliminate unwanted interference and reveal unaltered sonar echoes, resulting in true arches of fish targets.

Features
  • GPS Speed Included
  • Backlight
  • Waterproof
  • Quick Disconnect mount
  • Dimensions: 6.9" x 7.5" x 4.5"
  • Optional In-dash mount
  • Transducer: XNT-9-20-T
  • Transducer Mounting:     Transom
  • Power Input: 10-20 VDC
  • Power Draw: 615 mA
  • Switchfire Sonar
  • Split Screen Zoom
  • Split Screen Bottom Lock
  • Wide Narrow Cone Split Screen
  • Freeze Frame with the ability to Mark Structure on Sonar
  • Selective Fish ID+
  • Real Time Sonar RTS Window
  • Sonar Echo Enhancement
  • TrueArch Technology
  • 3D Chart View
  • Large digits
  • Custom View Selections
  • Custom Digital Readout Selection
  • Selectable Display Colors
  • Selectable Background Colors
  • Triplog
  • X-Press Menu System
     
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