Garmin GMR 404, GMR 406 User Manual

GMR 404/406

Owner’s Manual

© 2006, 2007 Garmin Ltd. or its subsidiaries

Garmin International, Inc.
1200 East 151st Street,
Olathe, Kansas 66062, USA
Tel. [phone] or [phone]
Fax [phone]

All rights reserved. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated,
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of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly
prohibited.

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without obligation to notify any person or organization of such changes or improvements. Visit the Garmin Web site (www.garmin.com) for current updates and
supplemental information concerning the use and operation of this and other Garmin products.

Garmin®, GPSMAP®, AutoLocate®, TracBack®, BlueChart®, and MapSource® are registered trademarks of Garmin Ltd. or its subsidiaries and may not be used without
the express permission of Garmin.

Garmin (Europe) Ltd.
Unit 5, The Quadrangle,
Abbey Park Industrial Estate,
Romsey, SO51 9DL, UK
Tel. [phone] (outside the UK)
0808 2380000 (within the UK)
Fax [phone]

Garmin Corporation
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Tel. [phone]
Fax [phone]

January 2007 Part Number

190-00669-00 Rev. B Printed in Taiwan

IntroductIon > About thIs MAnuAl

IntroductIon

This manual covers the features and operation of the GMR 404/406
marine radar when viewed on a Garmin marine network chartplotter.

The Appendix contains specications, regulatory information, and

maintenance information. You can also nd warranty, European

Licensing Requirements, and FCC information in the Appendix.

An Index is provided at the end of the manual for reference.

Installing Your GMR 404/406

To install your GMR 404/406, refer to the GMR 404/406 Installation
Instructions included in this box. If you experience difculty

installing the radar, contact Garmin Product Support or an installation
professional in your area.

About This Manual

To get the most out of your GMR 404/406, take time to read this
manual and learn the operating procedures for your unit in detail. This
manual is organized into the following sections.

The Introduction section contains the Table of Contents, Product
Registration, and Software License Agreement.

The Basic Operation section describes the features and operation of
the GMR 404/406.

GMR 404/406 Owner’s Manual i

IntroductIon > tAble of contents

table of contents

Introduction ...........................................................................i

Installing Your GMR 404/406 ................................................... i

About This Manual ................................................................... i

Product Registration .............................................................. iii

Contact Garmin .............................................................................. iii

Software License Agreement ................................................ iii

Warnings ................................................................................. iv

Important Information ............................................................ iv

Basic Operation ...................................................................1

Understanding Radar .............................................................. 1

Understanding the Radar Display ................................................... 2

Radar Page ............................................................................... 3

Conguring the Radar Page ............................................................ 3

Using the Radar Adjustment Menu ................................................ 4

Map Page Radar Overlay ........................................................ 9

Radar Tab ............................................................................... 10

General Sub Tab............................................................................ 10

Display Sub Tab ............................................................................ 11

MARPA Sub Tab........................................................................... 12

Advanced Sub Tab ........................................................................ 13

Appendix ............................................................................14

Specications ........................................................................ 14

4 ft Open-Array Antenna .............................................................. 14

6 ft Open-Array Antenna .............................................................. 14

Open-Array Scanner .....................................................................14

European License Requirements ........................................ 15

Limited Warranty ................................................................... 16

FCC Compliance .................................................................... 17

Declaration of Conformity (DoC) ......................................... 17

Index ...................................................................................18

ii GMR 404/406 Owner’s Manual

IntroductIon > Product regIstrAtIon And softwAre lIcense AgreeMent

Product Registration

Help us better support you by completing our online registration
today! Connect to our Web site at www.garmin.com/registration/.

Use this area to record the serial number (8-digit number located
on the back of the GMR 404/406 pedestal door) in case your
GMR 404/406 needs service. Keep the original sales receipt, or a
photocopy, in a safe place.

Serial Number: ___ ___ ___ ___ ___ ___ ___ __

Contact Garmin

Contact Garmin if you have any questions while using your
GMR 404/406. In the USA contact Garmin Product Support by
phone: [phone] or 800/800.1020, Monday–Friday, 8 AM–5 PM
Central Time; or go to www.garmin.com/support/, and click Product
Support.

Software License Agreement

BY USING THE GMR 404/406, YOU AGREE TO BE BOUND BY THE
TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE LICENSE
AGREEMENT. PLEASE READ THIS AGREEMENT CAREFULLY.

Garmin grants you a limited license to use the software embedded in this device
(the “Software”) in binary executable form in the normal operation of the
product. Title, ownership rights, and intellectual property rights in and to the
Software remain in Garmin.

You acknowledge that the Software is the property of Garmin and is protected
under the United States of America copyright laws and international copyright
treaties. You further acknowledge that the structure, organization, and code
of the Software are valuable trade secrets of Garmin and that the Software in
source code form remains a valuable trade secret of Garmin. You agree not to
decompile, disassemble, modify, reverse assemble, reverse engineer, or reduce
to human readable form the Software or any part thereof or create any derivative
works based on the Software. You agree not to export or re-export the Software
to any country in violation of the export control laws of the United States of
America.

In Europe, contact Garmin (Europe) Ltd. at +44 (0) 870.8501241
(outside the UK.) or 0808 2380000 (UK only).

GMR 404/406 Owner’s Manual iii

IntroductIon > wArnIngs And IMPortAnt InforMAtIon

Warnings

Failure to avoid the following potentially hazardous situations could
result in an accident or collision resulting in death or serious injury.

• The radar scanner transmits electromagnetic energy. Ensure that the
scanner has been installed according to the recommendations given
in this guide, and that all personnel are clear of the scanner before
switching to transmit mode.

• For protection from lightning, this installation must conform to NFPA
code, section 302. The installation of a lightning protective mast is
recommended, and the scanner must be connected to water ground
using an 8 gauge copper cable.

WARNING: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive harm.
This Notice is provided in accordance with California’s Proposition 65. See www.garmin.com/prop65 for more information.

• Use the GMR 404/406 at your own risk. To reduce the risk of
unsafe operation, carefully review and understand all aspects
of this Installation Manual, and thoroughly practice operation
using the simulator mode prior to actual use. When in actual
use, carefully compare indications from the GMR 404/406 to all
available navigation sources, including the information from other
NAVAIDs, visual sightings, charts, etc. For safety, always resolve any
discrepancies before continuing navigation.

• Use the GMR 404/406 only as a navigational aid. Do not attempt to
use the GMR 404/406 for any purpose requiring precise measurement
of direction, distance, location, or topography.

Important Information

The California Electronic Waste Recycling Act of 2003 requires the recycling of certain electronics. For more information on the applicability to this product, see

www.erecycle.org.

iv GMR 404/406 Owner’s Manual

bAsIc oPerAtIon > understAndIng rAdAr

basIc operatIon

This section covers the features and operation of the GMR 404/406.

Understanding Radar

The GMR 404/406 transmits a narrow beam of microwave energy
in a rotating 360° pattern. When the transmitted energy contacts a

target, some of that energy is reected and returned to the scanner.

The scanner collects the returned energy to process and display.
Your GMR 404/406 is operated and adjusted using controls on your
Garmin Marine Network chartplotter. You can view radar data on the
Radar Page or as an overlay on the Map Page. All radar controls are
accessible from both pages.

When you turn on the radar, the status bar shows the message “Radar
Warming Up” with a countdown to Standby Mode. The countdown
also appears in the middle of the Radar Page. When the countdown
reaches 0 (zero), the “Hold FCTN to transmit” message appears.

As a safety feature, the radar enters standby mode after it warms
up. This gives the operator an opportunity to verify that the area
around the scanner is clear before beginning radar transmission. It is
important to remember that the microwave energy transmitted by the
scanner can potentially be dangerous.

When the area surrounding the scanner is clear, press and hold
FCTN. The message “Do you want to begin radar transmission?” is
shown. Select Yes, and then press ENTER.

CAUTION: The GMR 404/406 transmits microwave energy that

has the potential to be harmful to humans and animals. Before
beginning radar transmission, verify that the area around the radar
is clear. The radar transmits a beam approximately 12° above and
below a line extending horizontally from the center of the scanner.
Avoid looking directly at the scanner, because the eyes are the
most susceptible part of the body.

GMR 404/406 Owner’s Manual 1

bAsIc oPerAtIon > understAndIng rAdAr

Before transmission begins, the message “Spinning Up” is shown
while the radar antenna reaches nominal rotation speed. After the
message disappears, the radar begins painting an image.

Using Range Rings

Use the Range Rings to quickly determine the distance to a target.
The lower-right corner of the screen contains two scales. The top
scale value represents the distance from the center of the radar display

Understanding the Radar Display

The Radar Page shows a status bar along the top, user-congurable

digital navigation data down the right side, a Heading Line, and
Range Rings. Soft keys that allow quick access to radar functions and
setting changes appear along the bottom of the page.

Heading line

Range

rings

Soft

keys

to the outermost complete ring. The bottom scale represents the ring
separation or the distance between the Range Rings. Use the RANGE
keys to zoom in or out. The tick marks on the Range Rings are
arranged with major tick marks at 30 degree increments and minor

tick marks every ve degrees. The tick marks can help in quickly

determining the azimuth to a target.

3/4 nm

1/2 nm

1/4 nm

Heading Line

Zoom scale

Ring separation

The Heading Line is shown from your current position along the path
of your current heading.

2 GMR 404/406 Owner’s Manual

bAsIc oPerAtIon > rAdAr PAge

Radar Page

A properly installed radar is detected as a new network connection
when you turn on your Garmin Marine Network chartplotter.

NOTE: A software update may be needed for the radar to

function properly. If the message “Incompatible Software
Version” appears when you turn on your chartplotter, you must
update your chartplotter software. A software update card is
provided with the GMR 404/406.

Conguring the Radar Page

You can customize the appearance of the Radar Page.

NOTE: For detailed information about conguring Digital 1 and

Digital 2 data elds, see your chartplotter owner's manual.

To add or remove functions on the Radar Page:

1. Open the Radar Page, and then press and hold the

DATA/CNFG key to open the Conguration window.

When the new radar is detected, the Radar Page is added to the page
sequence. If the Radar Page is not available, press and hold
ADJ/MENU to open the Main Menu. Highlight the System tab, and
select Radar from the Services list at the bottom of the page.

To view the Radar Page:

Press PAGE repeatedly until the Radar Page appears.

2. Using the ROCKER, highlight the function you want to add or
remove, and press ENTER. Only functions with a check mark

Radar Page

GMR 404/406 Owner’s Manual 3

in the check box next to them appear on the Radar Page.

bAsIc oPerAtIon > rAdAr PAge

Using the Radar Adjustment Menu

Use the Radar adjustment menu to access the settings and features
most commonly used on the Radar Page including: Gain, Sea Clutter,
Rain Clutter, FTC, Zoom, Target Expansion, Trails, Guard Zone,
VRM/EBL, MARPA, and Hide/Show Navigation Features.

To select an adjustment option from the Radar Page

1. Press ADJ/MENU to open the Radar adjustment menu.

2. Press up or down on the ROCKER to highlight the option you
want to change, and then press ENTER.

Gain

Gain controls the sensitivity of the Radar receiver. Auto (default)
is the recommended setting. It automatically adjusts the gain to
provide optimal performance. You can also set gain manually. To see
more detail, increase the receiver sensitivity by selecting a higher
gain. If there is too much detail, or the screen is cluttered, lower the
sensitivity (lower the gain) to increase the clarity of the screen.

Sea Clutter

Sea Clutter controls unwanted screen clutter caused by choppy sea
conditions. The slider has three preset positions: Calm, Moderate,
and Rough.

Rain Clutter

Rain Clutter controls unwanted screen clutter caused by rain at close
ranges (use the slider to select 1-100%).

To change a Radar adjustment menu setting:

1. Select an adjustment menu option using the method described
previously.

2. Press up or down on the ROCKER to change the setting,
range, or percentage.

3. Press ENTER to accept the change, or press QUIT to close
the Radar adjustment menu.

4 GMR 404/406 Owner’s Manual

bAsIc oPerAtIon > rAdAr PAge

FTC (Fast Time Constant)

FTC controls unwanted screen clutter caused by rain at a distance. The
Fast Time Constant has four settings: Off, Low, Medium, and High.

Target Expansion

Use Target Expansion to increase the size of a target. Select On or
Off.

Zoom

Zoom allows you to zoom in on a selected area of the radar screen.
When you select a zoom range, a window showing a zoomed portion
of the screen appears in the lower-left corner and a selection box
appears. To view different areas at the selected zoom range, open
the Radar adjustment menu, and then press the Move soft key. Use
the ROCKER to move the selection box. The Zoom setting has four
settings: Off, 2x, 4x, and Move.

NOTE: The Target Expansion setting has no effect at range scales

of 4 nm or greater.

Target Expansion Off Target Expansion On

Zoom view

GMR 404/406 Owner’s Manual 5

Selection box

bAsIc oPerAtIon > rAdAr PAge

Trails

Trails allows you to select whether all returns on the screen leave a
history trail, and allows you to determine the length of the history
trail (Off, Short, Medium, or Long).

Trails On Trails Off

Guard Zone

A Guard Zone is a user-dened area of protection. If a target enters
the Guard Zone, an alarm sounds. You can dene two Guard Zones.

The Guard Zone Menu has two areas, “Guard Zone 1” and “Guard
Zone 2.” Each area has two settings, Show (Hide) and Adjust.

6 GMR 404/406 Owner’s Manual

To Dene a Guard Zone:

1. Highlight Show Guard Zone 1 or 2, and press ENTER.

2. Highlight Adjust, and press ENTER.

3. Using the ROCKER, dene the area on the Radar Page by adjusting
three points:

• Corner 1

• Corner 2

• Circular

4. Press ENTER to set the Guard Zone.

Guard Zone

bAsIc oPerAtIon > rAdAr PAge

VRM/EBL

You can adjust the diameter of the VRM and the angle of the EBL.
The (Variable Range Marker (VRM) and Electronic Bearing Line
(EBL) tools measure range and bearing to a target. You can move
the center point of the VRM, which allows you to measure from one
target to another. Two
VRM/EBL tools can be active at the same time.

The VRM/EBL option has two areas, VRM/EBL 1 and VRM/EBL 2.
Each area has two settings, Show (Hide) and Adjust.

To use the VRM/EBL, expand the diameter of the VRM so that the

outer edge touches the target. Rotate the EBL until it intersects the

VRM at the target location. The measured range and bearing are

displayed in the lower-left corner of the screen.

Variable Range Marker(VRM) Electronic Bearing Line (EBL)

To start VRM/EBL 1 or VRM/EBL 2:

On the Radar Adjustment menu, highlight Show VRM/EBL 1

or VRM/EBL 2, and then press ENTER.

To adjust the VRM/EBL:

1. Highlight Adjust and press the ROCKER to the right. Highlight
Adjust and press ENTER.

2. Press right or left on the ROCKER to rotate the EBL around
the center point of the VRM.

3. Press up or down on the ROCKER to increase or decrease
the size of the VMR.

4. Press ENTER to accept the changes.

To move the center location of the VRM:

1. Highlight Move, and press ENTER.

2. Using the ROCKER, move the center point of the VRM to the
selected location.

3. Press ENTER to set the new location.

GMR 404/406 Owner’s Manual 7

bAsIc oPerAtIon > rAdAr PAge

MARPA

The Mini Automatic Radar Plotting Aid (MARPA) function helps
with collision avoidance. MARPA can track up to 10 designated

For each target, a number and Vector Line is shown with the symbol.
The number is the MARPA list ID number. The Vector Line is a

visual reference of the target’s course and speed.
targets. Detailed information including bearing, range, course, speed,
closest point of approach (CPA), and time to closest point of approach
(TCPA) for each target is shown in the MARPA list.

NOTE: MARPA requires the use of a heading sensor. The

heading sensor must output the NMEA sentence HDM or HDG
at format 0183, v2.30 or higher. The Gamin Marine Network was
tested using the KVH® 1000 heading sensor using six second
dampening.

While a target is being designated, a red box appears around the

target. When MARPA begins tracking the target, the box is replaced

with the appropriate symbol.

MARPA relies on a Heading Sensor to provide accurate own vessel
heading information. Accurate heading data enhances MARPA’s
performance. Each target being tracked by MARPA is represented by
a symbol. The symbols indicate the current state of the target.

Acquiring target

Target is safe

Target is dangerous

To designate a MARPA target:

1. Use the ROCKER to move the pointer to the target location.

2. Press the Acquire Target soft key.

Safe

targets

Acquiring

target

Dangerous

target

Lost target

8 GMR 404/406 Owner’s Manual

bAsIc oPerAtIon > MAP PAge rAdAr overlAy

To view the MARPA List:

Press the MARPA List soft key.

Set Motor to High Speed (Set Motor to Normal Speed)

The Set Motor to High Speed (Set Motor to Normal Speed) option

allows you to select the motor speed of the GMR 404/406. Selecting

Set Motor to High Speed to increases the speed at which the radar

rotates, thus increasing the speed at which the screen updates.

Map Page Radar Overlay

Radar information can be shown as an overlay on the Map Page.

When you overlay radar information on the Map Page, press

ADJ/MENU to access radar options.

Enter Standby (Begin Transmitting)

The Enter Standby (Begin Transmitting) option allows you to
select whether the radar is in Standby Mode or is transmitting.
Select Enter Standby to place the radar into Standby Mode. While
in Standby Mode, the radar does not transmit, but power remains
applied to the Magnetron. Select Begin Transmitting to remove the
radar from Standby mode. After the radar completes “Spinning Up”,
the radar begins transmitting.

NOTE: When the radar is placed into standby mode, the GMR

404/406 will reduce its spinning speed for approximately 15
seconds, then stop perpendicular to the length of the boat, or as

dened by the Front of Boat Offset.

NOTE: Changing the map scale does not change the radar range.

When you zoom in or our on the Map Page, the radar overlay is

scaled to t.

To overlay radar data on the Map Page:

On the Map Page, press the Show Radar soft key.

GMR 404/406 Owner’s Manual 9

bAsIc oPerAtIon > rAdAr tAb

Map Page with Radar Overlay and Radar Page

To access and change a setting on the Radar tab:

To hide the radar data overlay on the Map Page:

1. Press the Radar Options soft key.

2. Press the Hide Radar soft key. The radar overlay is hidden.

Radar Tab

1. Press the Setup soft key on the Radar Page to open the Main

2. Highlight the setting you want to change, and then press

3. Press QUIT to return to the Radar Page.

When GMR 404/406 is connected to a Garmin Marine Network
chartplotter, and either the Auto-Detect Services or Radar check
box is selected on the System tab, the Radar tab appears on the Main
Menu.

General Sub Tab

Use the General sub tab to select orientation, timed transmit, and

cross-talk rejection. The available General sub tab options are:

Menu. The Radar tab is automatically selected.

ENTER.

•

Use the Radar tab to set up the Radar Page. The Radar tab has four
sub tabs: General, Display, MARPA, and Advanced.

10 GMR 404/406 Owner’s Manual

Orientation—sets the orientation of the Radar Page display.
The settings are Heading Up, North Up, or Course Up.

bAsIc oPerAtIon > rAdAr tAb

• North Indicator—toggles the north indicator arrow on or off.

• Timed Transmit

—used to save power, usually while at anchor.

When Timed Transmit is On, the radar uses the settings in

Timed Transmit XMIT Time and Timed Transmit STBY
Time elds. When Timed Transmit is Off, these elds are

unavailable.

• Timed Transmit XMIT Time—sets the amount of time (in
minutes) for which the radar transmits. For example, if set to
01 min, the radar transmits for one minute before switching to
standby for the amount of time entered in the Timed Transmit

STBY Time eld.

• Timed Transmit STBY Time

—sets the amount of time (in
minutes) that the radar is in standby mode. For example, if set
to 10 min, the radar is in standby mode for 10 minutes before
switching to transmission for the amount of time entered in
the Timed Transmit XMIT Time eld. When the radar is in
standby mode, the scanner does not rotate or transmit; however,
power is still applied to the Magnetron, eliminating the need
for a warm-up cycle.

Cross-talk Rejection—toggles cross-talk rejection on or off.

•
Radar cross-talk may occur when two or more radar equipped
vessels are operating in proximity to one another. Cross-talk

rejection automatically lters out the cross-talk interference.

Display Sub Tab

Use the Display sub tab to adjust settings for: Center Offset, Rings,
Background color, Heading Line, Bearing Reference, and Navigation
Features.

The available Display sub tab options are:

•

Center Offset—sets your location on the screen. Center
places your current location in the center of the screen. Look
Ahead shifts your current location toward the bottom of the
screen, allowing you to view an area farther ahead. Auto Shift
adjusts your location on the screen according to the current
speed.

GMR 404/406 Owner’s Manual 11

bAsIc oPerAtIon > rAdAr tAb

• Rings—toggles the radar rings on or off.

Background—sets the background color for the Radar Page.

•
Available options are Black, Blue, or White.

Heading Line—toggles the heading line on or off.

•

Bearing Reference—sets your bearing, either Absolute or

•
Relative. Relative calculates the bearing relative to own vessel
heading. Absolute calculates the bearing referring to North.

Navigation Features—allows you to show or hide

•
navigational features on the Radar Page. Use the ROCKER
and the ENTER key to select or clear options.

Waypoints—show user waypoints on the Radar Page.

•

Bearing Line—show a bearing line on the Radar Page. The

•

bearing line appears as a line from your current position
to the active destination waypoint, similar to a traditional
lollipop.

Course Line—show a course line from your starting

•
point to the active destination waypoint, which is similar to
navigation on a map.

The available MARPA sub tab options are:

• Vector Length—

predicts the target’s approximate position at
a set time interval. This setting determines the length of the
Vector Line, based on the time interval setting and the target’s
speed. The time interval settings range from .05 minutes to 60
minutes.

• Target History—

is a trail showing a target’s movement. Target

History can be turned On or Off.

Own Vessel Safe Zone—is a circular area dened by a range

•

setting that is centered on your own vessel. If a target enters the

dened area an alarm is sounded. The Safe Zone can be set to a

distance between .01 and 2 nautical miles.

MARPA Sub Tab

The MARPA sub tab contains settings for Vector Length, Target
History, Own Vessel Safe Zone, Time To Safe Zone, Safe Ring Zone,
and Velocity Reference.

12 GMR 404/406 Owner’s Manual

• Time To Safe Zone—

that a target will intersect the Own Vessel Safe Zone within the

dened time interval. The time interval settings range from 3 to

24 minutes.

sounds an alarm if MARPA determines

bAsIc oPerAtIon > rAdAr tAb

• Safe Zone Ring—displays a ring on the Radar Page depicting
the Own Vessel Safe Zone.

Velocity Reference—has two settings, Absolute and Relative.

•

This setting determines how speed and direction are displayed
on the MARPA list. Relative calculates target speed and
direction relative to your own. Absolute shows the target’s
actual speed.

Advanced Sub Tab

Use the Advanced sub tab to set AFC mode, front of boat offset and
antenna size.

• AFC Mode—sets how the scanner frequency is adjusted.
Select Auto to automatically adjust the scanner frequency for
optimal performance (recommended). Select Manual to set the
frequency manually.

To manually adjust the scanner frequency:

1. Highlight the AFC Mode eld, and press ENTER.

2. Select Manual, and press ENTER.

3. Highlight the Freq button to the right of the AFC Mode eld,

and press ENTER.

NOTE: The Freq button is available only available if Manual is

selected in the AFC Mode eld.

4. Press up or down on the ROCKER to adjust the scanner

frequency.

5. Press ENTER to accept the frequency change.

NOTE: The Signal Strength bar graph is damped and may be

slow when responding to frequency tuning changes.

• Signal Strength—Shows the strength of the radar signal

Front of Boat Offset—allows you to offset the front of the

•
boat if you mount the radar at an angle.

Antenna Size—allows you to select the size of your antenna

•
(4 Foot or 6 Foot). Select 4 Foot for a GMR 404 radar; select

The available Advanced sub tab settings are:

GMR 404/406 Owner’s Manual 13

6 Foot for a GMR 406 radar.

APPendIx > sPecIfIcAtIons

appendIx

Specications

4 ft Open-Array Antenna

Type: End fed slotted waveguide

Horizontal Beamwidth: 1.8 degrees

Horizontal Sidelobes: -23 dB within ±10 deg of main

-30 dB outside ±10 deg of main

Vertical Beamwidth: 24 degrees

Antenna Gain: 29 dBi

Polarization: Horizontal

Input Return Loss: Better than -20 dB

Weight: 12 lbs (5.4 kg)

6 ft Open-Array Antenna

Type: End fed slotted waveguide

Horizontal Beamwidth: 1.1 degrees

Horizontal Sidelobes: -25 dB within ±10 deg of main

-30 dB outside ±10 deg of main

Vertical Beamwidth: 24 degrees

Antenna Gain: 30 dBi

Polarization: Horizontal

Input Return Loss: Better than -20 dB

Weight: 16 lbs (7.3 kg)

Open-Array Scanner

Transmit Power: 4 kW

Transmitter Frequency:

Input Voltage: 10.5 – 38 volts DC

Typical Input Power:

Input Power (100 kts wind): 130 W maximum

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

Antenna Rotation: 24 rpm and 48 rpm

Maximum Wind Load: 100 kts

Receiver Noise Figure: Less than 4 dB

Environmental: Temp: -10ºC to +60ºC

Humidity: 95% at 35ºC
Rel Wind: 100 kts
Waterproof to IEC 60529 IPX6

Range: 20 meters minimum, 72 nm max

Range Discrimination: 20 meters

9410 ±30 MHz

45 W

14 GMR 404/406 Owner’s Manual

APPendIx > euroPeAn lIcense requIreMents

Radar Interference: Anti-jamming algorithm

Clutter Suppression: Sea Clutter, Rain Clutter, FTC

Weight: 42 lbs (19 kg)

Dimensions: 17" x 11" x 16"

Cable: 49.21' (15 meters) long; 8.4 lbs (3.8 kg)

Radar Display Features

Presentation Modes: North up, Course up, Heading up

VRM/EBL: 2 user adjustable, capable of oating

Bearing Accuracy: 1 degree

Range Ring Accuracy: 20 meters or ±1.5% of range scale, whichever is

greater.

Controls: Auto & Manual Gain Adjust; Manual or Auto (AFC) receiver tuning;
Manual adjust for Rain Clutter and 3 presets for Sea Clutter; FTC presets.

Radar/Chart Overlay: Overlay mode is supported. Also has split overlay with
standard radar presentation

Zoom Mode: 2x, 4x

Trails (Wakes):

Guard Zone Alarm: 2 guard zones – user adjustable

Off center Function: Look ahead, Auto Shift, and Manual

Antenna RPM: Selectable to 24 or 48 rpm

MARPA: Tracks up to 10 MARPA targets for radar plotting and collision

avoidance. (Heading sensor is required).

Short, Medium, Long

European License Requirements

The following table shows European License requirements for the
GMR 404/406.

Austria I Luxembourg I
Belgium G The Netherlands I
Czech Republic I Poland G
Denmark G Portugal G
Estonia I Slovakia *
Finland I Slovenia G
France G Spain *
Germany G Sweden G
Greece G United Kingdom I
Hungary * Cyprus G
Ireland I Malta *
Italy G Iceland G
Latvia I Norway I
Lithuania G Switzerland I

I —requires an individual license for operation.

G—can be operated under a general license or license exemption.

* This product may require licensing in your country of use. Refer to the national

radio or telecommunications ofce or ministry.

GMR 404/406 Owner’s Manual 15

APPendIx > lIMIted wArrAnty

Limited Warranty

All Garmin marine radomes and open array scanners are warranted to be
free from defects in materials or workmanship for two years from the date of
purchase. Within this period, Garmin will, at its sole option, repair or replace any
components that fail in normal use. Such repairs or replacement will be made at
no charge to the customer for parts or labor, provided that the customer shall be
responsible for any transportation cost. This warranty does not cover failures due
to abuse, misuse, accident, or unauthorized alteration or repairs.

THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE
EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS,
IMPLIED, OR STATUTORY, INCLUDING ANY LIABILITY ARISING
UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS
WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY VARY
FROM STATE TO STATE.

IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL,
SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, WHETHER
RESULTING FROM THE USE, MISUSE, OR INABILITY TO USE THIS
PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not
allow the exclusion of incidental or consequential damages, so the above
limitations may not apply to you. Garmin retains the exclusive right to repair
or replace the unit or software or offer a full refund of the purchase price at its
sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE
REMEDY FOR ANY BREACH OF WARRANTY.

To obtain warranty service, contact your local Garmin authorized dealer or call
Garmin Product Support for shipping instructions and an RMA tracking number.
Securely pack the unit and a copy of the original sales receipt, which is required
as the proof of purchase for warranty repairs. Write the tracking number clearly

on the outside of the package. Send the unit, freight charges prepaid, to any
Garmin warranty service station.

Online Auction Purchases: Products sold through online auctions are not
eligible for rebates or other special offers from Garmin. Online auction

conrmations are not accepted for warranty verication. To obtain warranty

service, an original or copy of the sales receipt from the original retailer is
required. Garmin will not replace missing components from any package
purchased through an online auction.

International Purchases: A separate warranty is provided by international
distributors for units purchased outside the United States. This warranty is
provided by the local in-country distributor and this distributor provides local
service for your unit. Distributor warranties are only valid in the area of intended
distribution. Units purchased in the United States or Canada must be returned to
the Garmin service center in the United Kingdom, the United States, Canada, or
Taiwan for service.

Garmin International, Inc. Garmin (Europe) Ltd.
1200 East 151st Street, Unit 5, The Quadrangle,
Olathe, Kansas 66062, USA Abbey Park Industrial Estate,
Tel. [phone] or Romsey, SO51 9DL, UK
[phone] Tel. [phone] (outside the UK)
Fax [phone].2380000 (within the UK)
Fax [phone]

Garmin Corporation
No. 68, Jangshu 2nd Road,
Shijr, Taipei County, Taiwan
Tel. [phone]
Fax [phone]

16 GMR 404/406 Owner’s Manual

APPendIx > fcc coMPlIAnce And doc

FCC Compliance

The GMR 404/406 complies with Part 80 of the FCC rules. It has
received a grant of equipment authorization, issued under the authority
of the FCC.

This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one of the following
measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for
help.

Declaration of Conformity (DoC)

Hereby, Garmin, declares that this GMR 404/406 is in compliance
with the essential requirements and other relevant provisions of
Directive 1999/5/EC.

To view the full Declaration of Conformity, see the Garmin Web site
for your Garmin product: http://www.garmin.com/products/gmr404/.
Click Manuals, and then select the Declaration of Conformity link.

GMR 404/406 Owner’s Manual 17

Index

Index

A

Advanced sub tab 13
AFC mode 13
auto-detect services 10

B

Bearing Line 12
bearing reference 11, 12
begin transmitting 9

C

center offset 11
clutter

rain 4
sea 4

conguring

Radar Page 3

cross-talk rejection 11

D

digital navigation data 2
Display sub tab 11

E

EBL 7
enter standby 9

F

FTC 4

G

gain 4
Garmin Marine Network 8
guard zone 4, 6

dening 6

H

heading line 2, 11, 12
heading sensor 8
hide/show navigation features 4

M

main pages

Radar Page 3–7
manually adjust the radar 13
MARPA 4, 8–9

list 9

target 8
MARPA sub tab 10, 12
motor speed

high 9

normal 9

N

navigation features 4, 11, 12

O

orientation 10
Own Vessel Safe Zone 12

R

Radar

adjustment menu 4
background color 11
range rings 1

understanding 1
radar overlay 9
Radar Page 3

conguring 3

viewing 3
Radar tab 10–13

Advanced sub tab 13

Display sub tab 11

General sub tab 10

MARPA sub tab 12
radar warming up 1
rain clutter 4
range rings 2
rings 11

S

safety feature 1
safe zone ring 13
sea clutter 4
signal strength 13
software update 3

soft keys 2
spinning up 2
status bar 1

T

target expansion 4, 5
target history 12
Timed Transmit 11

STBY Time 11

XMIT Time 11
Time To Safe Zone 12
trails 4, 5

V

vector length 12
velocity reference 13
VRM 7
VRM/EBL 4

adjusting 7

W

warming up 1
waypoints 12

Z

zoom 4, 5
Zoom level 5

18 GMR 404/406 Owner’s Manual

For the latest free software updates (excluding map data) throughout the life of your

Garmin products, visit the Garmin Web site at www.garmin.com.

© 2006, 2007 Garmin Ltd. or its subsidiaries

Garmin International, Inc.

1200 East 151st Street, Olathe, Kansas 66062, USA

Garmin (Europe) Ltd.

Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL, UK.

Garmin Corporation

No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan

www.garmin.com

Part Number 190-00669-00 Rev. B