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 sonar options. As a standard sonar, The 698ci HD SI Combo features the Dual Beam Plus sonar technology, with a coverage of 20° / 60°, with operating frequencies of 200 / 83 kHz, and 455 kHz for Side Imaging / Down Imaging.
The standard transducer this unit comes with it’s a XNT 9 SI 180T, with a Transom mounting system. The head unit of the 698ci HD SI Combo features a Tilt / Swivel Quick Disconnect system, but the unit can fit to an in-dash Mounting Kit.
Regarding the GPS features of this unit, it has GPS Tracking and Chartplotting, offering storage for 2,750 waypoints, 45 routes, and tracks/points of 50/20,000. It provides the standard UniMap cartography package. However, it does support the Navionics Gold Hot Maps and Lakemaster, but these are optional.