Garmin GMR 41 & Garmin GMR 21: Marine Radar Units
Own a boat? Well, who doesn't nowadays? But then, without a powerful navigation system that's not really useful. Which is why Garmin has just launched two new marine radars in its popular GMR series: the Garmin GMR 21 and Garmin GMR 41.
Both the Garmin GMR 21 and Garmin GMR 41 are 24" diameter digital marine radar scanners compatible with the Garmin Marine Network. The advantage of these devices is that captured radar data is processed digitally within the radome itself (thanks to a DSP). This information can then be set up for presentation on a Garmin GPSMAP 3000 chartplotter.
Utilizing DSP significantly enhances radar echoes while filtering out unwanted extraneous data. The Garmin GMR21 and GMR41 are clearly successors to the GMR 20 and 40 radar scanners.
Both scanners employ a convex antenna design to give the radome a narrower beam width, and lower physical profile. Horizontal beamwidth is rated at 3.6° and 25° vertical. The 'Garmin 21 is a 2 kilowatt radome with 24 nm (nautical mile) range, while the 'Garmin 41 is the big one - a 4kW radome and 36 nm range.
Available controls on the devices include sensitivity, tuning, gain, sea/rain clutter among others. As many as 10 targets can be tracked, with reference to their bearing, course and speed. Check out the extended entry for detailed specs.
Targeted for a May 2006 release, the Garmin GMR 21 has a retail price of US $1,799.99, while the Garmin GMR 41 costs $2,199.99. Access Garmin's website for details.
- Physical size/RPM: 24" diameter radome, 8" high, 24 RPM
- Weight: 26 lb. radome
- Beam width: 3.6o maximum horizontal, 25o nominal vertical
- Receiver downconverter noise figure: 4 dB
- Power output: 2kW (GMR 21), 4kW (GMR 41)
- Power input: 10-35 Vdc, 25W
- Maximum/minimum range: 24nm/20m (GMR 21), 36nm/20m (GMR 41)
- Range scales (range rings): 1/8nm (1/32nm) to 36nm (9nm)
- Operating temperature range: -15oC to 70oC, relative humidity up to 95% at 35oC
- Range ring (bearing accuracy): 20 meter +/- 1.5% of range scale, whichever is greater, (1 degree)
- True or relative motion mode
- Variable range markers: 2 user adjustable, capable of floating
- Electronic bearing lines: 2 user adjustable, capable of floating
- User waypoints and navigation lollipop, with ability to create waypoints on radar display
- Guard zone alarm: 2 zones, user adjustable
- Zoom mode: 2x and 4x
- Trails: short, medium, and long
- Timed transmit: variable transmit and standby times
- Off center function: look ahead, auto shift, and manual
- Cable length: 15 meters
- Waterproof: IEC 60529 IPX-7
"Garmin is an industry pioneer in the development of digital radar and its presentation over our Marine Network via an Ethernet connection," said Gary Kelley, Garmin's vice president of marketing. "With the Garmin GMR 21 and 41, we're offering the same best-in-class low profile and narrow beam width -- now available in a space-saving 24-inch radome."
Package Includes:
Mount hardware kit
Power/marine network cable (15 meters)
Cable connector kit
Cable holder
Cable grommet
Installation manual
Owner's manual
Stumble It! | Posted by Paul on March 27, 2006 8:25 AM
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