GMR 404 - Marine radar GARMIN - Free user manual and instructions
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| Product Type | Marine Radar |
| Brand | Garmin |
| Model | GMR 404 |
| Dimensions (H x W x D) | Approx. 150 x 120 x 80 mm |
| Weight | Approx. 1.0 kg |
| Power Supply | 12-24 V DC |
| Radar Type | Pulse Doppler |
| Antenna Type | Open array |
| Maximum Range | 36 nautical miles |
| Scan Speed | 24 RPM |
| Target Detection | Yes, with MARPA |
| Display Compatibility | Garmin chartplotters (NMEA 0183/NMEA 2000) |
| Waterproof Rating | IPX6 |
| Operating Temperature | -15°C to 55°C |
| Storage Temperature | -20°C to 70°C |
| Maintenance | Clean with soft damp cloth; avoid abrasive cleaners |
| Safety | Mount securely; avoid exposure to direct heat sources |
| Spare Parts | Contact Garmin for replacement parts |
Frequently Asked Questions - GMR 404 GARMIN
How do I install the GMR 404 radar?
Installation requires mounting the radome on a sturdy mast or tower using the supplied bracket. Connect to a compatible Garmin chartplotter via NMEA 2000 or NMEA 0183. Refer to the installation manual for detailed instructions.
What chartplotters are compatible with the GMR 404?
The GMR 404 is compatible with Garmin chartplotters that support marine radar, such as the GPSMAP series, ECHOMAP series, and others with NMEA 2000 or NMEA 0183 connectivity. Check the compatibility list on Garmin's website.
How do I adjust the radar range?
From the chartplotter display, select the radar screen and use the range controls (usually +/- keys) to adjust the displayed range from 0.5 to 36 nautical miles. You can also use the auto-range feature.
What is MARPA and how does it work?
MARPA (Mini Automatic Radar Plotting Aid) automatically tracks targets and provides their course, speed, and closest point of approach. It helps with collision avoidance. Enable MARPA from the radar menu on your chartplotter.
How do I clean the radar antenna?
Use a soft damp cloth with mild soap and water. Avoid abrasive cleaners or solvents. Ensure the radar is turned off before cleaning. Regular cleaning maintains performance.
What should I do if the radar does not turn on?
Check the power supply (12-24 V DC) and connections. Ensure the circuit breaker is on. Test the cable for damage. If the issue persists, consult the troubleshooting section of the manual.
Can I use the GMR 404 with third-party chartplotters?
The GMR 404 is designed for Garmin chartplotters. While it uses standard NMEA 0183/NMEA 2000 protocols, full functionality may not be supported with third-party devices. Check with the manufacturer.
How do I update the radar software?
Updates are performed via the connected chartplotter using a Garmin SD card or Garmin Express software. Download the latest software from the Garmin website and follow the update instructions.
What is the maximum rotation speed of the antenna?
The antenna rotates at 24 RPM (rotations per minute) in normal mode. This provides a fast update rate for target tracking.
Is the GMR 404 weatherproof?
Yes, it has an IPX6 waterproof rating, meaning it can withstand heavy rain and splashes. However, it should not be submerged. Ensure the radome is properly sealed after installation.
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USER MANUAL GMR 404 GARMIN
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Product information
Brand : GARMIN
Model : GMR 404
Category : Marine radar