This is one of the best fish finders in the new Humminbird 600 series. It actually comes to replace 798ci HD SI Combo and the 597ci HD DI Combo, offering a better palette of options than both its two predecessors, at a price in between.
The Humminbird 698ci HD SI Combo features a 5-inch diagonal, 480 x 640 pixel resolution screen, brilliant color (TFT type) with backlight.
In terms of sonar capabilities, this unit has both Side Imaging and Down Imaging, with a 100ft. depth reliability for the SI/DI