# Garmin ECHOMAP UHD2 74sv vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N: specs and price compared

A sourced, side-by-side comparison of the Garmin ECHOMAP UHD2 74sv (Garmin) and Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N (Humminbird) among marine chartplotters.

## Side by side

| Spec | Garmin ECHOMAP UHD2 74sv | Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N |
| --- | --- | --- |
| US price | $1099.99 | not published |
| Brand | Garmin | Humminbird |
| Display size (in) | 7 | 9 |
| Resolution px | 800x480 | 1024x600 |
| Sonar builtin | Ultra High-Def SideVü, ClearVü, and Traditional CHIRP | MEGA CHIRP + MEGA Side Imaging+ + MEGA Down Imaging+ |
| Chirp frequencies (kHz) | Traditional CHIRP 50/77/83/200; ClearVü/SideVü 260/455/800/1000/1200 | MEGA CHIRP: full 150-220, narrow 180-240, wide 140-200, optional 28-250; MEGA SI+ 1050-1175; MEGA DI+ 1100-1200; also supports 50/83/200/455/800 |
| Gps type | Multi-band GPS, GLONASS, Galileo, BeiDou, 10 Hz | Internal GPS receiver with trackplotting; Humminbird Basemap preloaded (10,000+ lakes plus US coastal) |
| Touchscreen | Yes | No |
| Networking | NMEA 2000, Wi-Fi (Garmin Marine Network), Bluetooth, ANT | Ethernet (5-port switch compatible), NMEA 2000, Bluetooth, Wi-Fi, One-Boat Network |
| Preloaded charts | Garmin Navionics+ U.S. Coastal & Great Lakes Mapping (incl. 1-year chart-update subscription) | Humminbird Basemap (10,000+ lakes plus continental US coastal coverage); LakeMaster/CoastMaster/Navionics compatible but sold separately |

## Key differences

- Display size (in): Garmin ECHOMAP UHD2 74sv 7 vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N 9
- Resolution px: Garmin ECHOMAP UHD2 74sv 800x480 vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N 1024x600
- Sonar builtin: Garmin ECHOMAP UHD2 74sv Ultra High-Def SideVü, ClearVü, and Traditional CHIRP vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N MEGA CHIRP + MEGA Side Imaging+ + MEGA Down Imaging+
- Chirp frequencies (kHz): Garmin ECHOMAP UHD2 74sv Traditional CHIRP 50/77/83/200; ClearVü/SideVü 260/455/800/1000/1200 vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N MEGA CHIRP: full 150-220, narrow 180-240, wide 140-200, optional 28-250; MEGA SI+ 1050-1175; MEGA DI+ 1100-1200; also supports 50/83/200/455/800
- Gps type: Garmin ECHOMAP UHD2 74sv Multi-band GPS, GLONASS, Galileo, BeiDou, 10 Hz vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N Internal GPS receiver with trackplotting; Humminbird Basemap preloaded (10,000+ lakes plus US coastal)
- Touchscreen: Garmin ECHOMAP UHD2 74sv Yes vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N No
- Networking: Garmin ECHOMAP UHD2 74sv NMEA 2000, Wi-Fi (Garmin Marine Network), Bluetooth, ANT vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N Ethernet (5-port switch compatible), NMEA 2000, Bluetooth, Wi-Fi, One-Boat Network
- Preloaded charts: Garmin ECHOMAP UHD2 74sv Garmin Navionics+ U.S. Coastal & Great Lakes Mapping (incl. 1-year chart-update subscription) vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N Humminbird Basemap (10,000+ lakes plus continental US coastal coverage); LakeMaster/CoastMaster/Navionics compatible but sold separately

## Sources

- Garmin ECHOMAP UHD2 74sv: https://www.garmin.com/en-US/p/762374/pn/010-02685-01/ (garmin.com, verified 2026-08-01)
- Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N: https://humminbird.johnsonoutdoors.com/us/shop/fish-finders/helix/helix-9-chirp-mega-si-gps-g4n (humminbird.johnsonoutdoors.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/marine-chartplotters/garmin-echomap-uhd2-74sv-vs-humminbird-helix-9-chirp-mega-si-plus-gps-g4n/
Cite: Per The Front Desk Review, Garmin ECHOMAP UHD2 74sv ($1099.99) vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/marine-chartplotters/garmin-echomap-uhd2-74sv-vs-humminbird-helix-9-chirp-mega-si-plus-gps-g4n/
License: CC BY 4.0.