![]() ![]() This unit has DualBeam Plus sonar, which means you can see both the sonar returns in split screen, and also the DI returns. It can store in its memory chip up to 2,500 waypoints, 50 routes and 50 tracks (20,000 points each). It’s also compatible with the Navionics mapping package. For example, this unit is equipped with Precision GPS, chartplotting and trackplotting, having the UniMap mapping package built-in. Along with the Down Imaging option, come quite a few other very useful features. The 581i HD DI Combo has a medium size screen, 5-inch diagonal, 640×320 pixel resolution. Although it only features a black and white screen, 16 lvl grayscale, the images for both SwitchFire and Down Imaging, and also the mapping displays, are quite clear and accurate. ![]() The Humminbird 581i HD DI Combo, is also one of the new models with HD display and Down Imaging, as it’s name suggests it. ![]()
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June 2023
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