Humminbird 398ci SI Chartplotter Fishfinder Combo
$216.00
Humminbird 398ci SI Chartplotter Fishfinder Combo combines Side Imaging, Down Imaging, DualBeam PLUS with a 3.5-inch display and integrated GPS mapping. It is built to show sonar returns, structure, and chart data together for more confident navigation and fishing decisions.
Overview Humminbird 398ci SI Chartplotter Fishfinder Combo
Humminbird 398ci SI Chartplotter Fishfinder Combo combines chartplotter and fishfinder functions in one marine unit, making it easier to read sonar returns and navigation data from the same screen. Built around a 3.5-inch display, the 240H x 320V display is matched with Side Imaging, Down Imaging, DualBeam PLUS so the unit can support both route decisions and fishing setup.
Humminbird 398ci SI Chartplotter Fishfinder Combo is especially useful for operators who want one display to manage navigation, waypoint work, and sonar interpretation without moving between separate devices. Internal Precision; Built-in UniMap (LakeMaster/Navionics Ready); 1,500 ft (Sonar) / 100 ft (SI/DI).
Key Features
- Display clarity: Uses a 3.5-inch display with 240H x 320V so sonar, charts, and system data remain easier to read from the helm.
- Sonar capability: Side Imaging, Down Imaging, DualBeam PLUS. Scans structure to both sides of the boat for better coverage when searching flats, ledges, and channels.
- Positioning: Internal Precision keeps chart position and waypoint updates responsive for navigation and return-to-spot accuracy.
- Chart support: Built-in UniMap (LakeMaster/Navionics Ready) supports route planning and local detail without forcing a generic navigation setup.
- Depth performance: 1,500 ft (Sonar) / 100 ft (SI/DI) shows the sonar range and conditions the model is intended to handle.
Applications
This compact SI model is suited to smaller fishing boats that still need side-looking structure detail and onboard GPS mapping. It helps when scanning shorelines, isolated cover, and channel edges while moving between spots without giving up too much console space.
The smaller screen works best where portability or a tight dash matters, but the Side Imaging layout still gives useful left-and-right coverage for finding productive water.
Specifications
| Display Size | 3.5 inches Diagonal |
| Display Resolution | 240H x 320V |
| Display Type | Color TFT (Sunlight Readable) |
| GPS Receiver | Internal Precision |
| Sonar Technology | Side Imaging, Down Imaging, DualBeam PLUS |
| Power Output | 500 Watts (RMS) / 4,000 Watts (PTP) |
| Max Depth | 1,500 ft (Sonar) / 100 ft (SI/DI) |
| GPS Mapping | Built-in UniMap (LakeMaster/Navionics Ready) |
| Operating Voltage | 10-20V DC |
| Product Warranty | 1-Year Limited Manufacturer Warranty |
What’s Included
- Humminbird 398ci SI Chartplotter/Fishfinder Unit
- XNT 9 SI 180 T Transom-Mount Transducer
- Tilt-and-Swivel Quick-Disconnect Mount
- Power Cable (6 ft)
- Installation Hardware and Mounting Gasket
- User Manual and Documentation Pack
Frequently Asked Questions About Humminbird 398ci SI Chartplotter Fishfinder Combo
What kind of onboard use is Humminbird 398ci SI Chartplotter Fishfinder Combo built to support?
Humminbird 398ci SI Chartplotter Fishfinder Combo is designed for smaller fishing boats that still need side-looking structure detail and onboard GPS mapping. It combines 3.5 inches Diagonal display with Side Imaging, Down Imaging, DualBeam PLUS to support navigation, fishfinding, and everyday helm decisions.
How does this display support charting and sonar use?
This unit is described with 3.5 inches Diagonal display with 240H x 320V resolution; Side Imaging, Down Imaging, DualBeam PLUS; Built-in UniMap (LakeMaster/Navionics Ready). Those details make it easier to read navigation data and interpret underwater information during normal use.
What integration or networking support is mentioned for this chartplotter?
This marine display includes Internal Precision, which supports data sharing, position updates, or system expansion when those functions are listed for the model. That can be useful for owners who want charting, sonar, and connected onboard information working together.
How does this unit support day-to-day visibility and control?
This system is aimed at smaller fishing boats that still need side-looking structure detail and onboard GPS mapping, so its stated feature set matches practical day-to-day navigation and fishfinding needs. The listed Color TFT (Sunlight Readable) supports easier viewing and more confident operation in changing marine conditions.
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