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HUMMINBIRD 581i HD DI Combination Fishfinder/Chartplotter

Item: 408990-1
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Contents of the Package

In the box:

  • 581i HD DI Display
  • Transom mount transducer
  • Mounting bracket
  • Installation hardware
  • Owner's manual


Model 581i HD DI Combination Fishfinder/Chartplotter

Experience the Power of Down Imaging Sonar

The 581i HD DI Combo features a high definition 16 level grayscale 640V x 320H, 5" display with 300 watts RMS power output and GPS Chartplotting with built-in UniMap™.

Down Imaging 2D Sonar Technology

This view provides complete understanding of what, exactly, is going on below your boat. Quickly identify structure with Down Imaging™, while using 2D to locate and target fish. Together, they take the guesswork out of sonar fishfinding.

Humminbird UniMap

The built-in UniMap covers the contiguous U.S.A. coastline and inland lakes and rivers at 30 meters per pixel resolution. On the coast, this clearly shows features as small as canals, and many coastal navigation lights. Inland, the UniMap 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! The detail of these charts can be seen right on this page. With the UniMap, you have a chart virtually anywhere you travel in the United States.

Advanced Sonar Features

  • Freeze Frame with ability to Mark Structure on Sonar
  • Real Time Sonar RTS Window
  • Selective Fish ID
  • Sonar Echo Enhancement
  • Split Screen Zoom
  • Wide Narrow Cone Split Screen
User Friendly Technology

  • Custom Digital Readout Selection
  • Custom View Selections
  • Large Digits View
  • Quick Disconnect Mounting System
  • Triplog
  • X Press Menu System


   5" diag. 16 level grauscale LCD
   640 x 320 Pixels
   7"W x 7"H x 4"D
   Built-in UniMap, optional Navionics Gold/HotMaps, LakeMaster
  2500 waypoints, 50 routes, 20,000 trackpoionts, 50 saved tracks
  200/455 KHz Switchfire sonar; 455/800KHz Down Imaging sonar
   Internall GPS antenna included
Power 300 Watts

Transduser    Transom mount transducer included

Other Functions

  Ethernet;  NMEA 0183 in/out
 One Year

Item number: 408990-1
UPC: 082324038358
Shipping weight: 9 lb

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.

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