The HELIX 7 CHIRP GPS G4N is one of the Humminbird fish finders without Side Imaging or Down Imaging. It also does not support MEGA Live sonar or MEGA 360 Imaging. However, since it’s a G4N unit, it does support radar, i-Pilot Link and has superior networking features. It’s a 7-inch unit, with a pixel matrix of 1024 x 600. It has two microSD card slots, and comes with a classic Gimbal mount.
The unit has Dual Spectrum CHIRP sonar. It includes the XNT 9 HW T transducer which is a plastic model, featuring a transom mount, an internal temperature sensor, and 20 ft. (6 m) of cable. The unit supports three main frequencies, these being 50 kHz, 83 kHz, and 200 kHz. However, the transducer only supports the High CHIRP range. It casts conical beams with a coverage of 42° for the Wide Mode, and 25° for the Narrow Mode. It has a depth range of 1,200 ft. (365 m).
Of course, the unit offers the full range of standard sonar functions. It has A-Scope, Bottom Lock, Selective Fish ID, WhiteLine, Circular Flasher, Sonar Recording, and more. It also has a Temperature Graph function.
Like all the other HELIX units, this one comes with the Humminbird Basemap. It supports LakeMaster, CoastMaster, SmartStrike, and Navionics charts, so you can always upgrade it with a new charts card. It also has the AutoChart Live feature which uses the unit’s sonar and GPS for detecting and drawing depth contours on your map. Thus, you can create your own bathymetric maps, in case the current Humminbird Basemap doesn’t cover your favorite lake.
The unit’s GPS is a 10 Hz one. Thus, it can provide position updates 10 times per second. You can also save up to 2,750 waypoints in its memory, 47 routes, and 50 tracks. Each track can have 20,000 points.
Since it’s a G4N unit, it features an Ethernet port and an NMEA 2000 port. It has wireless connectivity as well, so you can connect it to a WiFi hotspot for chart downloads, software updates, and more. You can also plan trips, modify depth contours, and benefit from other features via the FishSmart app.