Garmin GMR 404 User manual

GMR™404/406 Marine Radar
Ships. Shores. Birds. Weather.
Whatever you’re scanning on radar,
you’ll see it sooner – and in
sharper detail – when you scan
with Garmin’s new GMR 404
or 406 open array antennas. Both
are powerful 4 kW X-band digital
radars that combine 72 nm maximum
range with high-definition targeting.
The GMR 404 is a 4-foot scanner
with 1.8° beamwidth for superior
target separation. The GMR 406’s
6-foot “big sweep” antenna takes
beamwidth down to 1.1° for even more
detail. Any network-compatible Garmin
chartplotter can double as
your radar screen. And six pulse
length/PRF settings help optimize
target returns at all range scales.
New open array scanners extend Garmin’s radar horizons.

GMR™404/406 Marine Radar
© 2006 Garmin Ltd. or its subsidiaries
Garmin International, Inc.
1200 East 151st Street
Olathe, Kansas 66062, U.S.A.
913/397.8200 fax [phone]
Garmin (Europe) Ltd.
Unit 5, The Quadrangle
Abbey Park Industrial Estate
Romsey, SO51 9DL, U.K.
44/1794.519944 fax [phone]
Garmin Corporation
No. 68, Jangshu 2nd Rd.
Shijr, Taipei County, Taiwan
886/2.2642.9199 fax [phone]
www.garmin.com
Specifications are preliminary and subject to
change without notice.
* All radar graphics and cartography pictured here are
derived from a Garmin Marine Network™ system utilizing
the GPSMAP®3006C/3010C series chartplotter/MFD
(multifunction display).
0606 M01-00151-00
Antenna Type: End fed slotted waveguide
Input Return Loss: Better than -20 dB
Polarization: Horizontal
Antenna Gain: 29 dB (404), 30 dB (406)
Horizontal Sidelobes: -23 dB within +/-10 deg of main,
-30 dB outside +/-10 deg of main (404).
-25 dB within +/-10 deg of main,
-30 dB outside +/-10 deg of main (406).
Antenna Weight: 12 lbs (404), 16 lbs (406)
Pedestal Physical Size: 24” x 11” x 16”
Transmit Power: 4KW
Power input: 10.5-38 Vdc, 45W typical
Input Power
(100 kts wind): 130 W maximum
Antenna Beamwidth: 1.8 (404) and 1.1 (406) degrees horizontal /
25 degrees vertical (both 404 & 406)
Antenna RPMs: 24 rpm and 48 rpm
Scanner Operating
Temperature: Range: -10 degrees C to 60 degrees C,
and a relative humidity up to 95% at 35
degrees C
Wind Velocity
(relative): Withstands up to 100 Kts without
performance degradation
Scanner
Waterproofing: Waterproof to IEC 60529 IPX6 standards
Bearing Accuracy: 1 degree
Maximum Range: 72 nm
Minimum Range: 20 meters
Range Discrimination: 20 meters
Range Ring Accuracy: 20 meter or +/- 1.5% of range scale,
whichever is greater
Receiver Noise Figure: Less than 4 dB
Range/Pulse
Width/PRF
(nm/nsec/Hz): 0.125/65/2304
0.250/65/2304
0.500/80/2304
0.750/200/1152
1.0/250/1152
1.5/500/576
2.0/500/576
3.0/800/576
4.0/800/576
6.0-24/1000/576
36-72/1000/288
Clutter Suppression: Sea Clutter
Rain Clutter
FTC
Pedestal Weight: 42 lbs (19 kg)
Cable: 15 meters long
8.4 lbs (3.8 kg)
Controls: Auto & Manual Gain Adjust; Manual or
Auto (AFC) receiver tuning; Manual
adjust for Rain Clutter and 3 presets for
Sea Clutter; FTC presets.
*VRM/EBL: 2 user adjustable, capable of floating
*Presentation Modes: North up, Course up, Heading up
Interference Rejection: Yes - Anti-jamming algorithm
*Radar/Chart Overlay: Overlay mode is supported.
Also has split overlay with
standard radar presentation.
*Zoom Mode: 2x, 4x
*Trails: Short, Medium, Long
*Guard Zone Alarm: 2 guard zones - user adjustable
*Off center Function: Look ahead, Auto Shift and Manual
FTC: Low, Medium, High
*MARPA: Yes. Tracks up to 10 MARPA targets for
radar plotting and collision avoidance.
(Heading sensor is required)
With their super-narrow beamwidths and 4 kilowatts
of power, the Garmin GMR 404/406 series offer
outstanding clarity, precision and target definition.
As an aid in locational awareness, the GMR 404/406
radar image can be overlaid on the Garmin network’s
moving map cartography display.
A split-screen view allows simultaneous display of
mapping alongside the standard radar picture.