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Garmin GMR 21 - page 1
Owner’ s Manual marine radar GMR 21/41 ...
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Garmin GMR 21 - page 2
Garmin International, Inc. 1200 East 151 st Street, Olathe, Kansas 66062, U.S.A. T el. 913/397.8200 or 800/800.1020 Fax 913/397.8282 Garmin (Europe) Ltd. Unit 5, The Quadrangle Abbey Park Industrial Estate Romsey , SO51 9DL, U.K. T el. 44/0870.8501241 Fax 44/0870.8501251 Garmin Corporation No. 68, Jangshu 2 nd Road Shijr , T aipei County , T aiwan ...
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Garmin GMR 21 - page 3
GMR 21/41 Owner ’s Manual i I NTRODUCTION About This Manual Thank you for choosing Garmin’ s GMR 21/41 marine radar . The addition of the GMR 21/41 marine radar to your Garmin Marine Network, enhances the capability of your system by adding graphical radar data to your Garmin chartplotter . This manual covers the features and operation of the G ...
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Garmin GMR 21 - page 4
ii GMR 21/41 Owner ’s Manual I NTRODUCTION > T ABLE OF C ONTENTS Introduction ...........................................................................i About This Manual ................................................................... i T erminology used Throughout this Manual ........................... i GMR 21/41 Operation ........... ...
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Garmin GMR 21 - page 5
GMR 21/41 Owner ’s Manual 1 GMR 21/41 O PERA TION Radar Overview The Garmin GMR 21/41 transmits a narrow beam of microwave energy in a rotating 360° pattern. When the transmitted energy contacts a target, some of that ener gy is reflected and returned to the scanner . The scanner collects the returned ener gy for processing and display . The GM ...
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Garmin GMR 21 - page 6
2 GMR 21/41 Owner ’s Manual When the scanner is powered on, the Status Bar at the top of the Radar Page, shows the message “Radar W arming Up” with a countdown to Standby Mode. The countdown is also displayed in the middle of the Radar Page. When the countdown reaches zero, the message changes to “Hold FCTN to transmit.” As a safety featu ...
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Garmin GMR 21 - page 7
GMR 21/41 Owner ’s Manual 3 Radar Page Layout This section describes the features of the Radar Page and how its features are displayed. By default, the Radar Page displays a Status Bar along the top, user configurable Digital Navigation Data down the right side, a Heading Line, and Range Rings. Soft key options that allow quick access to radar f ...
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Garmin GMR 21 - page 8
4 GMR 21/41 Owner ’s Manual Range Rings The Range Rings help to quickly determine the distance to a target. In the lower-right corner of the display are two scales. The upper scale is the current zoom scale. This scale is changed using the RANGE keys. The zoom scale is represented by the Range Ring with tick marks around the circumference. The ti ...
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Garmin GMR 21 - page 9
GMR 21/41 Owner ’s Manual 5 The Radar Configuration Page The Radar Configuration Page is used to change the look of the Radar Page. Please refer to the GPSMAP 3000 series owner ’ s manual for information about “Configuring the Main Pages.” T o display the Radar Configuration Page: Press and hold DA T ACONFIG . The Radar Adjustment Menu ...
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Garmin GMR 21 - page 10
6 GMR 21/41 Owner ’s Manual GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU T o change a Radar Adjustment Menu setting: 1. Press ADJ/MENU to display the Adjustment Menu. 2. Use the Rocker or Data Entry keys to select an option. Press ENTER to display the adjustment for that selection. 3. Use the Rocker to change the current setting. Pres ...
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Garmin GMR 21 - page 11
GMR 21/41 Owner ’s Manual 7 GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU T o change the Sea Clutter setting: 1. Use the Rocker to move the slider to a preset or other position. 2. Press ENTER to accept the change. The preset positions can also be selected using the soft key options. Rain Clutter Adjusting the Rain Clutter setting can ...
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Garmin GMR 21 - page 12
8 GMR 21/41 Owner ’s Manual GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU Zoom When a Zoom level is selected, a window showing a zoomed portion of the screen appears and a selection box is shown. The selection box can be moved to see different areas. The Zoom setting has four presets: Off, 2x, 4x, and Move. T o change the Zoom setting: ...
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Garmin GMR 21 - page 13
GMR 21/41 Owner ’s Manual 9 GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU T rails When the T rails function is on, all returns on the display leave a history trail. The T rails setting determines the length of the history trail. The T rails setting has four presets: Off , Short , Medium , and Long . T o change the T rails setting: 1. U ...
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Garmin GMR 21 - page 14
10 GMR 21/41 Owner ’s Manual GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU T o Define a Guard Zone: 1. Use th e Rocker to highlight Show Guard Zone 1 or 2, and press ENTER . 2. Use the Rocker to highlight Adjust and press ENTER . 3. Using the Rocker , define the area on the Radar Page. 4. Press ENTER to accept the change. W ith a Gua ...
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Garmin GMR 21 - page 15
GMR 21/41 Owner ’s Manual 1 1 GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU T o move the center location of the VRM: 1. Use the Rocker to 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. T o use the VRM/EBL, expand the diameter of t ...
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Garmin GMR 21 - page 16
GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU While a target is being designated, a box is placed around the tar get. When MARP A begins tracking the target, the box is replaced with the appropriate symbol. Acquiring T arget T racking T arget T o display the MARP A List: Use the Rocker t o highlight MARP A List and press ENTER . MARP A L ...
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Garmin GMR 21 - page 17
GMR 21/41 Owner ’s Manual 13 GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU MARP A Setup Menu T o change a MARP A field option: 1. Use the Rocker to highlight the desired field and press ENTER to activate the field selections. 2. Use the Rocker to highlight the desired selection. 3. Press ENTER to accept the change. V ector Length— ...
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Garmin GMR 21 - page 18
14 GMR 21/41 Owner ’s Manual GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU Map Cursor On/Off The Map Cursor On/Off setting turns the Map Page Cursor on or of f when operating in Split Screen mode or when using two chartplotters. T o turn the Map Cursor On or Off: Use the Rocker to highlight Map Cursor On/Off and press ENTE R . Setup Se ...
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Garmin GMR 21 - page 19
GMR 21/41 Owner ’s Manual 15 GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU Timed T ransmit— is used to save power , likely while at anchor . When T imed T ransmit is On , the radar refers to the settings in T imed T ransmit XMIT T ime and T imed T ransmit STBY T ime. If Off is selected, the T imed T ransmit XMIT T ime and T imed T ra ...
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Garmin GMR 21 - page 20
16 GMR 21/41 Owner ’s Manual GMR 21/41 O PERA TION > T HE R ADAR A DJUSTMENT M ENU Rings— is used to turn the radar Range Rings On or Off. Background— is used to select a background color for the Radar Page. The options are Black, Blue, and White. Heading Line— is used to turn the Heading Line On or Off. Bearing Reference— has two sett ...
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Garmin GMR 21 - page 21
GMR 21/41 Owner ’s Manual 17 T o select an AFC mode: 1. Use the Rocker to highlight the AFC Mode field, and press ENTER . 2. Use the Rocker to highlight the selection, and press ENTER . T o manually adjust the scanner frequency: 1. Use the Rocker to highlight the Freq button, and press ENTER . 2. Using the Rocker , adjust the scanner frequency u ...
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Garmin GMR 21 - page 22
18 GMR 21/41 Owner ’s Manual Map Page with Radar Overlay Radar Page There are several Radar Options available on the Map Page. These options do affect operation of the radar and the Radar Page. T o display the Radar Options: 1. Press ADJ/MENU . 2. Use the Rocker to highlight Radar Options, and press ENTER . GMR 21/41 O PERA TION > M AP P AGE R ...
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Garmin GMR 21 - page 23
GMR 21/41 Owner ’s Manual 19 A PPENDIX European License Requirements Austria I Luxembourg I Belgium G The Netherlands I Czech Republic I Poland G Denmark G Portugal G Estonia * Slovakia * Finland I Slovenia G France G Spain * Germany G Sweden G Greece G United Kingdom I Hungary * Cyprus G Ireland * Malta * Italy G Iceland G Latvia I Norway I Lith ...
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Garmin GMR 21 - page 24
20 GMR 21/41 Owner ’s Manual Specifications Unit Dimensions: 28” (710 mm) D x 8” (205 mm) H Radar Scanner W eight: Unit 26 lbs; cable 8.35 lbs Range Scales (Range Rings): GMR 40—1/8 nm (1/32 nm) to 36 nm (9 nm). GMR 20—1/8 nm (1/32 nm) to 24 nm (6 nm) Power Output: GMR 21: 2 kW , GMR 41: 4kW Power Input Sour ce: 10–35 VDC, 28W . Operat ...
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Garmin GMR 21 - page 25
GMR 21/41 Owner ’s Manual 21 FCC Compliance The GM R 21 /41 com pli es w ith Pa rt 8 0 o f th e F CC r ule s. I t h as rec eiv ed a gr ant of equi pme nt auth ori zati on, iss ued und er the aut hor ity of the FCC . This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruct ...
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Garmin GMR 21 - page 26
22 GMR 21/41 Owner ’s Manual Software License Agreement BY USING THE GMR 21/41, YOU AGREE T O BE BOUND BY THE TERMS AND CONDITIONS OF THE FOLLOWING SOFTW ARE LICENSE AGREEMENT . PLEASE READ THIS AGREEMENT CAREFULL Y . Garmin grants you a limited license to use the software embedded in this device (the “Software”) in binary executable form in ...
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Garmin GMR 21 - page 27
GMR 21/41 Owner ’s Manual 23 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 RE ...
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Garmin GMR 21 - page 28
24 GMR 21/41 Owner ’s Manual A PPENDIX > W ARNINGS AND C AUTIONS Failure to avoid the following potentially hazardous situations could result in an accident or collision resulting in death or serious injury . W ARNING: The radar scanner transmits electromagnetic energy . Ensure that the scanner has been installed according to the recommendatio ...
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Garmin GMR 21 - page 29
GMR 21/41 Owner ’s Manual 25 I NDEX Index A About This Manual i Adjustment 5 Adjustment Menu 5 Advanced T ab 16 AFC Mode 16, 17 B Background 16 Background color 15 Bearing Line 16 Bearing Reference 15, 16 Begin T ransmitting 17 Begin T ransmitting. 13 C Caution 2 Center Offset 15 change Sea Clutter setting 7 change the Gain 6 Clear T rails 9 Con? ...
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Garmin GMR 21 - page 30
26 GMR 21/41 Owner ’s Manual I NDEX V V ariable Range Marker 10 V ector Length 13 V elocity Reference 13 VRM/EBL 5, 10 W W arming Up 2 W ARRANTY 22 W aypoints 16 Z Zoom 5, 8 Zoom level 8 Zoom Scale 3 ...
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Garmin GMR 21 - page 31
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Garmin GMR 21 - page 32
For the latest fr ee software updates (excluding map data) throughout the life of your Garmin products , visit the Garmin W eb site at www .garmin.com. © Copyright 2006 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151 st Street, Olathe, Kansas 66062, U.S.A. Garmin (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial ...
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