Garmin GHC20 Marine Autopilot Control Unit is the versatile helm controller you need for precise, effortless steering on power and sail vessels. Compatible with both legacy and newer Garmin autopilots, it also integrates seamlessly with the quatix watch for on-wrist control and convenience.
Designed for superior visibility in any conditions, the GHC20 features a large 4-inch color glass-bonded display with an anti-glare finish and a wide 170-degree viewing angle. Readable from a distance with enhanced daylight readability and multiple night-time color schemes, it ensures peak readability at all hours on the water.
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Vivid, readable display: 4-inch QVGA color LCD (320 x 240) with a glass-bonded anti-glare lens and 1200 cd/m² brightness for clear visibility in bright sunlight or dusk. The anti-fog, high-contrast screen is easy to read from anywhere on deck.
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Flexible daylight and night modes: High-contrast daylight color option plus night modes in red/black, green/black, or standard night mode with a dimmable backlight for comfortable viewing anytime.
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Universal Garmin compatibility: Works with newer Garmin autopilots and legacy models on both power and sail vessels. Power is supplied by the NMEA 2000 network for reliable, onboard integration.
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Streamlined control options: Optional handheld remote available, and the GHC20 can be controlled from the quatix marine GPS watch using ANT wireless technology for maximum convenience on the move.
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Rugged marine design: IPX7 water rating and a compact form factor (4.3" W x 4.4" H x 1.9" D) designed to withstand harsh marine environments while delivering precise autopilot control.
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Optimized compatibility with Garmin ecosystems: Includes trim piece cover options to match GPSMAP 500/700 series, GPSMAP 8000 Glass Helm series, or legacy Garmin chartplotters for a seamless helm appearance.
Specifications at a glance
- Display: 4.0" x 4.0" (approximately 320 x 240 px) color LCD
- Viewing angle: 170°
- Brightness: 1200 cd/m²
- Power: 9–16 VDC from NMEA 2000 bus; supports up to 32 VDC
- Max power consumption: 3 W
- Operating temperature: -15° C to 70° C (5° F to 158° F)
- Water rating: IPX7
- NMEA 2000 LEN: 7 (350 mA at 9 VDC)
What's in the box
- GHC™ 20 Black trim piece snap cover
- Protective cover
- Flush mount gasket and hardware
- NMEA 2000 drop cable
- NMEA 2000 T-connectors and terminators
- Documentation
| Unit dimensions, WxHxD |
4.3 " x 4.4 " x 1.9 " (10.9 x 11.2 x 4.8 cm) |
| Display resolution, WxH |
320 x 240 pixels |
| Display type |
QVGA color LCD display |
| NMEA output |
NMEA 0183, NMEA 2000® |
| Supply voltage |
Powered by NMEA 2000 bus, 9-16 VDC, units operate up to 32 VDC |
| Operating temperature |
-15° C to 70 C° (5° F to 158° F) |
| Max power consumption |
3W |
| Viewing angle |
170° |
| Brightness |
1200 cd/m2 (NIT) |
| Water rating |
IPX7 |
| NMEA 2000 LEN (Load Equivalency Number) |
7 (350 mA at 9VDC) |
