Humminbird® 409750-1 - Onix 8Ci Nt Si Combo

52 reviews / Item # mpn735682973 View Similar Products
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Product Details

Humminbird Accessories

Onix 8Ci Nt Si Combo (409750-1) by Humminbird®. The ONIX8ci NT SI Combo features a large 8.4" display with LED backlight. It has HD Side Imaging, HD Down Imaging and DSP (Digital Signal Processing) DualBeam PLUS sonar with SwitchFire with internal GPS Combo - up to 8000 Watts PTP power output. GPS Chartplotting with Humminbird TriFuel Cartography that gives you access to world background maps from Navionics, C-MAP and Humminbird LakeMaster. Includes unit cover. Maximize your angling experience with the Humminbird ONIX8ci NT SI Combo. This product is keypad control only. To use an external GPS receiver (AS GRP or AS GPS HS) an AS GPS NMEA is required.



Display Size - Diagonal: 8.4"
Display Pixel Matrix: 1024H x 768V
Display Type: Color TFT
Display Colors Grayscale: 16.7 mm Colors
Sonar Standard: HD Side Imaging/HD Down Imaging/DualBeam PLUS/Digital Signal Processing (DSP)
Standard Sonar Coverage: 20°, 60°, (2) 86° & (2) 55° @ -10db (Total of 180°)
Standard Sonar Frequency: 200/83/455/800/50* kHz
Sonar Optional: SM3000
Target Separation: 2.5"
Power Output RMS: 1000 Watts*
Power Output Peak to Peak: 8000 Watts*
Depth Capability: 150 ft (SI/DI), 1500 ft, 5000 ft* & 10,000 ft**
Temperature: Built In Transducer
Speed: GPS Speed Included
Backlight: LED
Unit Size - Gimbal Mount: 12.6"W x 8.25"H x 3.4"D
Mount A Type: Gimbal Mount
Unit Size - Indash Mount: 11"W x 6.875"H x 3.4"D
Mount B Unit Size2: Optional In-dash
Mounting Options: Gimbal or Optional In-Dash
Transducer Standard: XNT 14 20 HDSI T
Transducer Mounting: Transom
Power Input: 10-20 VDC
Power Draw: 2.5 Amps
GPS Receiver: Included
GPS Tracking: Included
GPS Chartplotting: Included
Waypoints, Routes, Tracks/Points: 5,000, 200, 50/20,000
Humminbird Mapping: Optional
Navionics+: Optional
Navionics Platinum+: Optional
Platinum Capable: Optional
C-Map 4D: Optional
360 Imaging: Optional
i-Pilot Link: Optional
HD Radar: Optional
NMEA 2000: Included
5 Port Expansion Module: Optional
WeatherSense: Not Included
Precision GPS: Included
Heading Sensor GPS: Optional
PC Connect: Not Supported
External GPS Receiver: Optional
AS Interlink: Not Supported
AIS Compatability: Optional
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: Not Supported
Wide/Narrow Cone Split Screen: Included
Custom View Selections: Included
Custom Digital Readout: Included
View Preset Keys: Not Supported
Temperature Graph: Included
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: Not Included
Card Reader Available: Yes
# Card Slots: 2


  • Carefully crafted to suit your specific boating needs
  • Engineered to high standards
  • High-grade design delivers extended lifespan
  • Made with premium materials
  • Guarantees proper performance

Boating is a great way to relieve stress and leave all your troubles on land. Enjoy your time out on the water even more with this top-notch marine product. Whether you're practicing your casts, exploring the amazing marine life with a snorkel, or just cruising on the open water for fun, you need to equip your vessel with the finest products to make sure nothing ruins your amazing recreational time. With CARiD you are covered from bow to stern, because we know exactly what you need to make your boating a breeze. This product will be great for all outdoor enthusiasts who enjoy traffic-free travel and wind in their hair. Made with durable materials, it will ensure a long-lasting performance for many exciting adventures to come.

For over 30 years Humminbird® has been an America’s favorite Fishfinder – the leading innovator of Side Imaging technology – providing recreational and professional anglers difference-making days out on the water, day after day, year after year. Humminbird introduced fishfinders, depth sounders, marine radios and GPS systems to anglers.

Part Number:

Warranty Information

1-Year Limited Warranty

Humminbird warrants the original retail purchaser that products made by Humminbird have been manufactured free from defects in materials and workmanship. This warranty is effective for one year from the date of original retail purchase. Humminbird products found to be defective and covered by this warranty will be repaired or replaced free of charge at Humminbird's option and returned to the customer freight prepaid. Humminbird's sole responsibility under this warranty is limited to the repair or replacement of a product that has been deemed defective by Humminbird. Humminbird is not responsible for charges connected with the removal of such product or reinstallation of replaced or repaired parts.

This warranty does not apply to a product that has been:

  • Improperly installed;
  • Used in an installation other than that recommended in the product installation and operation instructions;
  • Damaged or has failed because of an accident or abnormal operation;
  • Repaired or modified by entities other than Humminbird.

Please retain your original receipt as a proof of the purchase date. This will be required for in-warranty service.

Product Reviews


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Humminbird® - Onix 8Ci Nt Si Combo
Humminbird® 409750-1 - Onix 8Ci Nt Si Combo
Average Rating: 4.8 of 5
4.8 of 5
Does The Job!
It works great for the type of kayak fishing I do. Easy to read and simple to work. Fixed mount to the kayak was an easy process. I've had it for 3 weeks and have used it 7 times already.
APosted by (Riviera, TX) /
Was this review helpful for you? Yes
4.8 of 5
Fish Finder
We like the large screen. It has a thick cover that is easy to get off and on. It was easy to install. It is a very good unit.
RPosted by (Wylie, TX) /
Was this review helpful for you? Yes

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