Item: 409380-1
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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.

Contents of the package

  • 398ci HD SI
  • Transom mount transducer
  • Mounting bracket
  • Installation hardware
  • Owner's manual


The 398ci SI Combo features a brilliant 240H x 320V, 3.5" display with LED backlight.  Side Imaging® and Down Imaging® sonar with 4000 watts PTP power output, Precision Internal GPS Chartplotting with built-in UniMap© cartography with a card slot for optional maps and saving waypoints along with a Tilt & Swivel Quick Disconnect mounting system.  The design also allows for  in-dash mounting with option kit.  Maximize your angling experience with the Humminbird 398ci SI fishfinder GPS system.

Side Imaging Sonar
Side Imaging Sonar -- Gain a 180 degree side to side perspective on the world below the surface.

For greater on-water flexibility, 360 Imaging lets you choose from five beam speed settings. Lower beam speeds lead to higher image quality but lower refresh rates. Conversely, higher beam speeds result in lower image quality but higher refresh rates. With five options, you can find the ideal setting for your boat speed, water conditions, and need for detail.

It's all in the details. Gain a 180 degree side-to-side perspective on the world below the surface with remarkable Humminbird Side Imaging. In an instant, the ultra-thin beam scans the area up to 240 feet to the left and right of your boat location-for total coverage of up to 480 feet. The return image for each slice is then added to the images taken immediately before and after to build an incredible view of the lake bottom. You can then magnify the detail of the image with the zoom feature or mark the GPS location of promising cover or structure directly on the screen.

Side Imaging's high-frequency beams reveal structure, cover, and contour changes with crystal clarity. The images are so real you might think it's a camera, but it?s not, so it doesn?t matter how murky the water is.

Down Imaging Sonar

Down Imaging Sonar -- Get a fish-eye's view of what's happening below your boat. Incredible images are created with High-frequency sound waves

Sometimes, to catch fish, not only do you have to think like one, you've got to see like one. Get a fish-eye's view of what's happening below your boat with Humminbird Down Imaging. These incredible images are created with high frequency sound waves emitted in ultra-thin slices. The sonar returns from these waves produce a "portrait." As you patrol the water, you'll watch fish, reefs, timber, brush, bridge pilings, rocks, and any other structure or cover pop with stunning detail.

SwitchFire Sonar -- Take command of how your sonar returns appear with our Clear and Max Modes.
Building on our legacy of sonar innovation, exclusive Humminbird SwitchFire puts anglers in complete command of how their sonar returns appear. With two unique display modes, you can adjust to your fishing conditions on the fly. Add or remove detail; account for water depth, temperature and turbulence; even experiment with lure presentations-all at the push of a button. SwitchFire adds a whole new dimension to 2D fish-finding. It's one more reason Humminbird is simply, clearly, better.

DualBeam Plus Sonar
Two beams combine for great detail and a wide coverage area. Use the narrow beam for high-accuracy returns and bottom. Use the wide beam when you want a larger search area.

Internal GPS
GPS antenna built into the head unit
Get unparalleled GPS technology out of the box. Many Humminbird fishfinders have our powerful Precision GPS/WAAS receiver built right in and provides fast position fixes accurate within 2.5 meters.

For those models without it, there are several options:
Add the Humminbird Precision GPS/WAAS receiver for permanent GPS capability on your boat. Use Humminbird?s adapter and the NMEA output on your own handheld GPS unit, or use Humminbird?s InterLink to allow two fishfinders to access one GPS receiver.

Single Card Slot
Single SD Card Slot -- Use for advanced cartography or to save your screenshots, sonar recordings and waypoints.

Unimap Cartography

The Humminbird UniMap is a built-in map covering the contiguous US coastline, inland lakes and rivers at 30 meters per pixel resolution.


    Display Size - Diagonal:3.5"
    Display Pixel Matrix:240H x 320V
    Display Type:Color TFT
    Display Colors Grayscale:256 Colors
    Sonar Standard:Side Imaging, Down Imaging, DualBeam PLUS
    Standard Sonar Coverage:20°, 60° & (2) 85° @ -10db (Total of 180°)
    Standard Sonar Frequency:200/83/455 kHz
    Sonar Optional:QuadraBeam PLUS
    Target Separation:2 1/2"
    Power Output RMS:500 Watts
    Power Output Peak to Peak:4000 Watts
    Depth Capability:100 ft (SI/DI), 1500 ft
    Speed:GPS Speed Included
    Mount A Unit Size:5.25"W x 7.4"H x 4"D
    Mount B Unit Size:5.25"W x 5.12"H x 1.12"D
    Unit Mount Type:Quick Disconnect/Optional In-Dash Mounting Kit
    Transducer Standard:XNT-9-SI-180-T
    Transducer Mounting:Transom
    Power Input:10-20 VDC
    Power Draw:380 mA
    GPS Receiver:Included
    GPS Tracking:Included
    GPS Chartplotting:Included
    Waypoints, Routes, Tracks/Points:2,500, 50, 50/20,000
    Navionics Gold/HotMaps:Optional
    Navionics Platinum +:Not Supported
    Platinum Capable:Not Supported
    C-Map:Not Supported
    360 Imaging:Not Supported
    iPilotLINK:Not Supported
    Radar2:Not Supported
    NMEA2000:Not Supported
    5 Port Expansion Module:Not Supported
    WeatherSense:Not Supported
    Precision GPS:Included
    Heading Sensor GPS:Not Supported
    PC Connect:Optional
    GPS Connecton Link:Not Supported
    AS Interlink:Not Supported
    AIS Compatability:Not Supported
    SwitchFire Sonar:Included
    Screen Snap Shot:Included
    Sonar Recording:Included
    Upgradable Internal Software:Included
    Split Screen Zoom:Included
    Split Screen Bottom Lock:Included
    3D Chart View:Included
    Large Digits View:Included
    Wide/Narrow Cone Split Screen:Included
    Custom View Selections:Included
    Custom Digital Readout:Included
    View Preset Keys:Not Supported
    Temperature Graph:Not Supported
    Temperature Alarm:Included
    Freeze Frame:Included
    Instant Image Update:Included
    Mark Structure on Sonar:Included
    Selective Fish ID+:Included
    Real Time Sonar:Included
    X-Press Menu System:Included
    MMC Compartment Available:Yes
    MMC #Slots:1

Item number: 409380-1
UPC: 082324042843
Package weight: 4 lb
Product Reviews

Following reviews were written by actual customers.
Every GPS4US customer has a chance to live a feedback after receiving a product.

by David I, , 8/1/2014
So far greAt! Good depth finder -even@20 mph, Small size perfect for my small skiff .gps no detail w/o optional card. Instructions are good