# Raymarine Axiom+ 9 vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N: specs and price compared

A sourced, side-by-side comparison of the Raymarine Axiom+ 9 (Raymarine) and Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N (Humminbird) among marine chartplotters.

## Side by side

| Spec | Raymarine Axiom+ 9 | Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N |
| --- | --- | --- |
| US price | $1299.99 | not published |
| Brand | Raymarine | Humminbird |
| Display size (in) | 9 | 9 |
| Resolution px | 1280x720 | 1024x600 |
| Sonar builtin | None built-in — chartplotter only; adding fishfinding requires an external sonar module and transducer via the 25-pin RealVision-type connector | MEGA CHIRP + MEGA Side Imaging+ + MEGA Down Imaging+ |
| Chirp frequencies (kHz) | — | 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 | GPS, GLONASS, BeiDou, internal ceramic chip antenna, SBAS (WAAS in the US) | Internal GPS receiver with trackplotting; Humminbird Basemap preloaded (10,000+ lakes plus US coastal) |
| Touchscreen | Yes | No |
| Networking | RayNet Ethernet (10/100 Mbps), NMEA 2000 (DeviceNet), Bluetooth 4.0, Wi-Fi 802.11 b/g/n, USB Micro-B, microSDXC | Ethernet (5-port switch compatible), NMEA 2000, Bluetooth, Wi-Fi, One-Boat Network |
| Preloaded charts | None on base SKU E70636; LightHouse Charts North America on SKU E70636-00-102 | Humminbird Basemap (10,000+ lakes plus continental US coastal coverage); LakeMaster/CoastMaster/Navionics compatible but sold separately |

## Key differences

- Resolution px: Raymarine Axiom+ 9 1280x720 vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N 1024x600
- Sonar builtin: Raymarine Axiom+ 9 None built-in — chartplotter only; adding fishfinding requires an external sonar module and transducer via the 25-pin RealVision-type connector vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N MEGA CHIRP + MEGA Side Imaging+ + MEGA Down Imaging+
- Gps type: Raymarine Axiom+ 9 GPS, GLONASS, BeiDou, internal ceramic chip antenna, SBAS (WAAS in the US) vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N Internal GPS receiver with trackplotting; Humminbird Basemap preloaded (10,000+ lakes plus US coastal)
- Touchscreen: Raymarine Axiom+ 9 Yes vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N No
- Networking: Raymarine Axiom+ 9 RayNet Ethernet (10/100 Mbps), NMEA 2000 (DeviceNet), Bluetooth 4.0, Wi-Fi 802.11 b/g/n, USB Micro-B, microSDXC vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N Ethernet (5-port switch compatible), NMEA 2000, Bluetooth, Wi-Fi, One-Boat Network
- Preloaded charts: Raymarine Axiom+ 9 None on base SKU E70636; LightHouse Charts North America on SKU E70636-00-102 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

- Raymarine Axiom+ 9: https://www.raymarine.com/en-us/our-products/chartplotters/axiom/axiom-plus (raymarine.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/raymarine-axiom-plus-9-vs-humminbird-helix-9-chirp-mega-si-plus-gps-g4n/
Cite: Per The Front Desk Review, Raymarine Axiom+ 9 ($1299.99) vs Humminbird HELIX 9 CHIRP MEGA SI+ GPS G4N (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/marine-chartplotters/raymarine-axiom-plus-9-vs-humminbird-helix-9-chirp-mega-si-plus-gps-g4n/
License: CC BY 4.0.