In-depth review of the Humminbird HELIX 7 Chirp SI/GPS G2 Combo


At the surface

There have been significant leaps in fish finder technology in recent years and the HELIX 7 Chirp SI/GPS G2 Combo is no exception.

This unit from Humminbird incorporates several of the latest features and augmented display quality that has casual and avid anglers singing its praise

Multi-frequency, side and down imaging with GPS and chartplotting capabilities turns this mid-priced unit into a value offering for most frequent users. The true all-in-one offering.


front photo of the HELIX 7 Chirp SI/GPS G2 Combo Humminbird Fish Finder against a white background

Going Deeper

Side Imaging Sonar (SI)

One of the most powerful and sought after features of the Helix 7 is the Side Imaging (SI) functionality that provides 180 degree view of the structure and contours surrounding the boat. The lateral range for each side is 240 feet providing a combined 480 feet of coverage.

The variety of the side imaging functions includes zoom capability, splitscreen views, range and contour functions for differing perspectives and color options to enhance contrast and detailing. In addition, the highly popular WayPoint marker function allows anglers to tag the GPS location of notable structure for return trips.

Switchfire Sonar (Down Imaging)

SwitchFire sonar is a customizable return of the sonar picture that allows anglers to adapt the sonar presentation to their conditions.

Dual mode presentation of Max Mode and Clear presentation options allows anglers to augment the returns for better detail (Max Mode) or tune out noise in shallow conditions (Clear Mode). Both modes allow for color palette selection to be customized to user preference or to adjust for visibility conditions such as strong sunlight.

Features and Benefits

  • Dualbeam+ Sonar allows for the best of both worlds, high frequency detail and lower frequency to capture a larger area
  • Internal GPS for industry standard position plot, compass heading and position assist
  • Additional Precision GPS module for position fixes within 2.5 meters accuracy
  • High Definition Ultra-Bright TFT Color display with LED backlight
  • Upgradable software capabilities to keep the Helix 7 up to date with the latest technology
  • Micro SD slot for advanced cartography, and recordings

Rating and Reviews

We reviewed 98 customer reviews at the time of this article and they had awarded the Humminbird HELIX 7 Chirp SI/GPS G2 Combo a 4.2 out of a possible 5.0 stars on average.

A large number of reviewers surveyed noted the “crisp” and “sharp” display imaging with several customers noting “I can see the screen clearly even when it’s sunny” referring to the low glare from the unit.

Additionally, most users pointed to the high level of accuracy from the dual GPS capabilities noting “the GPS is amazing". 

Several users noted “there was a bit of a learning curve” with respect to the side-imaging technology. Due to the 2D presentation of a 3D image, learning how to interpret the side-imaging visualization was a topic of discussion from those surveyed. As a result of these feedback from surveyed reviewers we’ve included a tutorial on side-imaging here.

Additionally, a small number of reviewers noted the “pixelated” or distorted sonar imaging. Given the various frequencies utilized by the unit and suitable mount locations for the transducer it is possible that motor interference could impact signal quality if not properly installed

Casting opinions

Overall, customers who’ve followed the prescribed installation and usage guidelines appear to be happy with the high definition and detailed display options. Increased accuracy from the dual GPS system has also generated positive customer feedback for chart-plotting and location scouting.

Simply put this unit from Humminbird has a broad range of features for a price that has customers praising the value of the Helix 7.


Tackle Box

Product Name

Humminbird HELIX 7 Chirp SI/GPS G2 Combo

Display Type

LED Colour Screen

Screen Size


Screen Resolution

800 x 480



Imaging Type

Down-imaging, Side Imaging (SI) and 2D


CHIRP sonar

Sonar Frequency

83/200 kHz 2D

455 kHz Down Imaging and SI

Transmit power

500 Watts RMS

Maximum depth

100 feet (SI) and 1500 feet 2D

Transducer mount

Transom mount





Speed Sensor


Temperature Sensor



1 Year Manufacturer


$699 USD

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