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
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.

Specifications

    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
    Temperature:Included
    Speed:GPS Speed Included
    Backlight:Yes
    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
    Lakemaster:Optional
    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
    Triplog:Included
    X-Press Menu System:Included
    MMC Compartment Available:Yes
    MMC #Slots:1

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

Other Products in the Series:

	HUMMINBIRD 325 with TM transducer	Add to comparison
	HUMMINBIRD 345c	Add to comparison
	HUMMINBIRD 345c DI Down Imaging	Add to comparison
	HUMMINBIRD 345c Portable	Add to comparison
	HUMMINBIRD 346c DI Down Imaging Fishfinder	Add to comparison
	HUMMINBIRD 365i Combo with Internal Antenna	Add to comparison
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	HUMMINBIRD 386ci Combo, 3.5 inch Color, 83/200KHz	Add to comparison
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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

Accessories:

Compatible maps:

Platinum+ Marine Charts on Micro SD Card

Hotmaps Platinum Lake Maps on micro SD card

Hotmaps Premium Lake Maps on micro SD card

More
info...

Batteries

Humminbird GCB, MFG 770027-1, 12 Volt, 7AH sealed AGM replacement battery for portable fishfinders.

770027-1
$49.95
GCB, MFG 770027-1, 12 Volt, 7A

Discontinued

Cables

Humminbird AS-HHGPS Handheld GPS Connection Kit

700030-1
$37.95
AS-HHGPS Handheld GPS Connecti

Humminbird EC-W30 30ft Transducer Extension cable

720003-2
$64.95
EC-W30 30ft Transducer Extensi

Humminbird EC W10 Transducer Ext. Cable, 7 pin, 10 ft

720003-1
$48.95
EC W10 Transducer Ext. Cable,

Out of stock

Cases and Covers

740036-1
$18.95
MC-W Mount Contact Cover

Mounts

740077-1
$37.95
MS-M, Quick disconnect mount s

Humminbird In-dash mount IDMK300, MFG 740086-1, for 300 sereis units.

740086-1
$41.95
In-dash mount IDMK300, MFG 740

RAM Rugged Use Marine Electronics Base w/1.5inch Ball Round Base

RAM-107BU
$17.99
Rugged Use Marine Electronics

Marine Networking

Humminbird Adv. Access. System PC Connection Kit

700035-1
$29.95
Adv. Access. System PC Connect

Discontinued

720002-1
$20.95
PC10 Power Cable

Humminbird EC-TS10 10ft Temp/Speed Extension Cable

720004-1
$48.95
EC-TS10 10ft Temp/Speed Extens

Discontinued

Humminbird AS-EC10 Accessory Extension Cable 10ft

720050-1
$29.95
AS-EC10 Accessory Extension Ca

Out of stock

720057-1
$23.95
PC11 Power Cable

Humminbird AS T Y Temp Sensor Adapter, 700HD Series

720075-1
$47.95
AS T Y Temp Sensor Adapter, 70

Sensors and Boards

730000-1
$64.95
TS-W Temp/Speed Sensor

Humminbird SW Speed Sensor, MFG 730021-1, Transom mount, with 20ft cable.

730021-1
$45.95
SW Speed Sensor, MFG 730021-1,

Transducers Humminbird

Humminbird XHS 9 HDSI 180 T Down HD Side Imaging depth transducer w temp

710201-1
$210.95
XHS 9 HDSI 180 T Down HD Side

Humminbird XPTH 9 HDSI 180 T Down Side Imaging depth transducer w temp

710210-1
$218.95
XPTH 9 HDSI 180 T Down Side Im

Compatible Maps and Software:

	Platinum+ Marine Charts on Micro SD Card Multi-dimensional marine charts that offer navigators and fishermen a selection of bonus information beyond the best available navigation charts such as panoramic pictures, 3D/2D views with satellite imagery, coast pilot guides, POIs & built-in offshore fishing detail! Maps are preprogramed on Micro SD memory card (comes with adapter).
	Gold Marine Charts on micro SD card 2-dimensional Gold marine charts are the navigation standard for serious mariners and fishermen offering the largest coverage areas for the widest range of today's most popular chartplotters. Features include tides, currents, wrecks, port plans, marsh areas, marine services, coastal roads, and much more. Whether you are on the water or planning a trip, Navionics Gold charts can take you there. Maps are preprogramed on micro SD card (comes with adapter).
	Fishing Charts on micro SD card Navionics all new Fish'N Chip - The most detailed inshore and offshore US fishing charts available - with up to 1' HD fishing bathy on select inshore estuaries and bays of the US East Coast, US West Coast and US Gulf Coast, High–resolution 1 meter bathy covering the entire Great Lakes, high-resolution offshore and canyon fishing bathy, vegetation and marsh areas, rocks, wrecks, offshore safety navaids, tides and currents, and professional guide waypoints. Available in the US and Canada (Great Lakes) only. Maps are preprogramed on micro SD card (comes with adapter).
	Hotmaps Platinum Lake Maps on micro SD card More than 17,000 total lake maps with complete fishing information for your GPS, plus over 1,000 high-definition lake maps featuring 3D View, Panoramic Lake Photos, Top-down Satellite Imagery, and exclusive 1' contours from Navionics own on-the-water surveys. Maps are preprogramed on micro SD card (comes with adapter).
	Hotmaps Premium Lake Maps on micro SD card More than 17,000 total lake maps with complete fishing information for your GPS, plus over 1,000 high-definition lake maps featuring exclusive 1' contours from Navionics own on-the-water surveys. Maps are preprogramed on micro SD card (comes with adapter).
	Hotmaps Lake Maps on micro SD card More than 14,000 total lake maps with complete fishing information for your GPS, plus over 700 high-definition lake maps featuring exclusive 1' contours from Navionics own on-the-water surveys. Preprogramed on micro SD card (comes with adapter).

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