GMR 20

GMR 20 digital, 2 kW with 24 nm range, 28-inch radome

GMR 40 digital, 4 kW with 36 nm range, 28-inch radome

GMR 21 digital, 2 kW with 24 nm range, 24-inch radome

GMR 41 digital, 4 kW with 36 nm range, 24-inch radome

GMR 404 digital, 4 kW with 72 nm range, 4-foot open array radar scanner

GMR 406 digital, 4 kW with 72 nm range, 6-foot open array radar scanner

Steering clear of trouble just got easier

The GMR 20 adds important radar information to a system that already includes GPS, sonar, and XM WX Satellite Weather data components—making our Marine Network one of the most comprehensive marine navigation systems on the market.

Digital Performance

The GMR 20 (2kW radome) features a narrow 3.6-degree horizontal and 25-degree vertical beamwidth, which delivers accurate target acquisition and better penetration through rain and fog. It has a range of 24 nautical miles (nm). For fast and efficient presentation of radar signatures, raw data is processed within the radome and presented on Garmin’s GPSMAP 3000 series chartplotter/multifunction displays (MFDs).

Easy to Use

The GMR 20 features automatic and manual sensitivity and tuning controls, including gain, sea clutter, and rain clutter—which allows boaters to spend less time tuning the unit and more time navigating. The unit also boasts selectable interference rejection, which mitigates the effect of nearby radar transmissions.

To aid in collision avoidance, the unit also offers Mini Automatic Radar Plotting Aid (MARPA) capability, which allows boaters to track the bearing, course, speed and predicted closest approach (by both time and distance) of up to 10 targets. MARPA functionality requires GPSMAP 3006/3010 MFDs and an optional heading sensor.

Advanced Features

Once the GMR 20 is interfaced with a GPSMAP 3006/3010 MFD, it is possible to overlay radar images on the charting to help reconcile radar signatures with known objects. Users can view "radar only" or split the display for multiple views of radar and charting.

Plug-and-play Connectivity

The GMR 20 communicates with the Garmin Marine Network through a waterproof 100-megabit plug-and-play proprietary network—which affords users the ability to expand their boat’s system as needed. Boaters can connect a GPS antenna and one remote network sensor (like the GMR 20) directly to the MFD—or with the addition of the GMS™ 10 Network Port Expander, users can connect multiple MFDs and network sensors to the same network.

The GMR 20: Giving boaters more confidence and enjoyment on the water.

GMR 21 Features:

• Receiver: WAAS-enabled, 12 parallel channel GPS receiver
• Display: 3.8-inch diagonal, 480 x 320 pixel, 256-color TFT screen with adjustable LED backlight
• Unit dimensions: 5.7"W x 3.2"H x 1.9"D
• Waypoints: Stores 3,000 waypoints and 50 reversible routes
• Tracks: 10,000 point automatic track log saves up to 15 tracks
• Battery life: Rechargeable lithium-ion battery offers 4 to 15 hours of use (4 hours with GXM 30 and 15 without GXM 30)
• Water resistant up to IEC 60529 IPX7 standards (submersible in one meter of water for 30 minutes)
• Preloaded inland lakes
• Built-in street navigation with voice prompts, using included cable and speaker
• Accepts the latest (optional) BlueChart g2 data cards
• Add optional GSD 21 for full-feature sonar capability
• Add optional GXM 30 antenna for XM WX Satellite Weather
• Provides tides and built-in celestial information
• NMEA 0183 input and output
• Removable quad helix antenna
• Single knob tilt/swivel mount