Humminbird Helix 12 CHIRP MEGA DI+ GPS G3N Fishfinder Chartplotter

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Item #: 357231
Humminbird Helix 12 CHIRP MEGA DI+ GPS G3N Fishfinder Chartplotter
Humminbird Helix 12 CHIRP MEGA DI+ GPS G3N Fishfinder Chartplotter
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We believe in offering the very best value, quality, and selection. Plus, we want you to enjoy your purchase! In the event you wish to send a product back to us, you may return most unused items for a refund or exchange, minus shipping, within 90 days from the date of purchase unless noted below under exceptions and exclusions. Refunds are issued to the original form of payment, unless returned in store where some exclusions may apply.

The Humminbird Helix 12 CHIRP MEGA DI+ GPS G3N Fishfinder features a commanding 12.1" display, MEGA Down Imaging+, and Dual Spectrum CHIRP Sonar. Includes GPS mapping, built-in Bluetooth, Ethernet networking capabilities, and the ability to create your own maps in real-time with AutoChart Live depth, vegetation, and bottom hardness mapping. Humminbird Basemap cartography is built-in, with the option to expand your mapping capabilities with available LakeMaster charts.

MEGA Down Imaging+
Get unprecedented underwater clarity with coverage down to 200' below your boat. MEGA Down Imaging+ unlocks more fish and structure with 20% more detail than MEGA Down Imaging Sonar.

Dual Spectrum CHIRP
Know what's below your boat thanks to long, well defined fish arches and a clear view of fish-holding structure and the bottom. Powered by the Low Q CHIRP transducer, Dual Spectrum offers two ways to search – wide mode for maximum coverage and narrow mode for maximum detail.

SwitchFire Sonar
Take command of how your sonar returns appear. With two display modes, you can add or remove detail, account for water depth, temperature, and turbulence, and even watch lure presentations – all at the push of a button.

Humminbird Basemap Built In
Enhanced standard basemap provides you with a clear view of underwater terrain and surrounding points of interest, so you can fish and navigate with total confidence. Identify buoys, day markers, hazards, marinas, contours, depth markers, and much more. Includes charts of more than 10,000 lakes, plus coastal coverage for the U.S.

AutoChart Live
Create real-time maps of your fishing spots. Map depth contours, bottom hardness, and vegetation as you drive your boat, with eight hours of built-in recording time.

Ethernet Networking
High-speed Ethernet allows you to build a powerful, professional-grade fishing system. Easily connect multiple fishfinders or upgrade to add-on technologies like Minn Kota i-Pilot Link, 360 Imaging, and CHIRP Radar.

Enable features like wireless software updates from the Humminbird FishSmart App and also keep your phone out of the water and in your pocket by displaying notifications on your Humminbird.

Included With The Humminbird Helix
Transducer and mounting hardware, power cable, gimbal mounting bracket, and unit cover.

Helix 12 CHIRP MEGA DI+ GPS G3N Specs
Display Size: 12.1" diagonal
Display Matrix: 1280H x 800V pixels
Display Colors Grayscale: 16-Bit
Display Type: Color TFT

Dual Spectrum CHIRP Frequencies: Full (150-220 kHz), Narrow (180-240 kHz), Wide (140-200 kHz)
Dual Spectrum CHIRP Depth: 1,200' (standard transducer)
Imaging Frequencies: 455 kHz / 800 kHz / MEGA DI+ (1100-1200 kHz)
Down Imaging Depth: 400' (455 kHz) / 125' (800 kHz) / 200' (MEGA)

Power Draw: 1.75 Amps
Power Input: 10.8 - 20V DC
Power Output Peak-to-Peak: 8000 Watts
Power Output RMS: 1000 Watts

GPS Chartplotting
Internal GPS Receiver
GPS Trackplotting: 2,500 waypoints / 47 routes / 50 tracks w/20,000 points
Humminbird Basemap Included

Keypad Control
Memory Card Slot: Dual SD
Screen Snap Shot
Sonar Recording
Size (Gimbal Mount): 14.86"W x 8.83"H x 4.25"D
Transom-Mount Transducer Included: XM 9 HW MDI T
Target Separation: 2.5"
View Preset Keys
X-Press Menu System
Custom Digital Readout
Custom View Selections
Temperature Built In
Temperature Alarm
Temperature Graph
  • MEGA Down Imaging+ with unprecedented clarity down to 200'
  • Dual Spectrum CHIRP for the sharpest sonar images
  • High-speed Ethernet networking capabilities
  • Built-in basemap
  • Bluetooth capabilities
Accepts Data Cards
14.86"W x 8.83"H x 4.25"D
Display Resolution
1280H x 800V pixels
Display Size
12.1" diagonal
Display Type
Included Cartography
Built-In Basemap
Max. Depth
1200.00 ft
Model Number
Operating Frequency
CHIRP / 455/800 kHz / 1.2 MHz
Power Output
1000.00 W
Unit Weight
14.42 lb
MFG Part No.
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