Item: 408240-1
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RAM Mounts
Marine Networking
Sensors and Boards
Transducers Humminbird
Compatible maps

Suggested Maps and Software:

Navionics Marine Charts

Navionics Marine Charts
Navionics charts are now a fundamental tool of navigation, featuring water depths, navaids, obstructions, and other information necessary for safe navigation. Marine and lake maps presented.

Contents of the package

In the box:

858c DI Display
GPS Antenna/receiver
Transom mount transducer
Mounting bracket
Installation hardware
Owner's manual


Use Down Imaging® to reveal cover and structure detail below your boat on a brilliant color, wide-screen 480V x 800H 7" display with CCFL backlight. Includes SwitchFire™ downlooking sonar, and chartplotting with LakeMaster® and Navionics® Platinum™ compatibility. DualBeam PLUS™ sonar with 4000 Watts PTP power output, GPS Chartplotting with built-in ContourXD map, and advanced Fishing System capabilities, now including radar. Includes unit cover. Maximize your angling experience with the Humminbird 858c DI Combo fishfinder GPS system.

Humminbird Contour XD Charts

The built-in Contour XD chart covers the contiguous U.S.A. coastline and inland lakes and rivers. On the coast, this clearly shows features as small as canals, and many coastal navigation lights. Inland, the Contour XD features virtually all recreational lakes and rivers, plus hundreds of thousands of small lakes that don’t appear on other charts. In other words, your lake is likely to be there!

Available Advanced Fishfinding System Modules:

WeatherSense Barometer for weather prediction

  • XM Weather Module
  • CannonLink for control of downrigger
  • InterLink for networking with other units
Advanced Sonar Features:

  • Switchfire Sonar
  • Screen Snap Shot to Memory Card
  • Sonar RecordingSplit
  • Screen Zoom
  • Split Screen Bottom Lock
  • Wide Narrow Cone Split Screen
  • Instant Image Update
  • Freeze Frame with the ability to Mark Structure on Sonar
  • Selective Fish ID+Real
  • Time Sonar RTS Window
  • Sonar Echo Enhancement
  • TrueArch Technology
User Friendly Technology

  • 3D Chart View
  • Large Digits View
  • Custom View Selections
  • Custom Digital Readout Selection
  • Selectable Display Colors
  • Selectable Background Colors
  • View Preset Keys
  • Temperature Graph
  • Temperature Alarm
  • Triplog
  • X-Press™ Menu System


Display                      7" diag. color LCD
Resolution                 480 x 800 pixels
Dimensions               11.25"W x 6.75"H x 4.25"D
Mapping                     Pre-loaded Humminbird ContourXD; optional LakeMaster and
                                   Navionics Gold/Platinum
Waypoints/Routes     3,000 waypoints; 50 routes; 50 saved tracks, 20,000 trackpoints
Antenna                      External antenna included
Sounder                      500 Watt, 200/455KHz dual beam sonar; 455/800KHz Down        
                                    Image sonar; transom transducer included
Radar                          Available radar antennas include 2KW, 12" and 4KW, 21" radomes
Other Functions        AIS (third party), Cannon Link, Ethernet hub, WeatherSense
Interface    Ethernet; NMEA 2000; NMEA 0183
Warranty                     One Year

Item number: 408240-1
UPC: 082324035692
Package weight: 7.3 lb