GMR 20/40 Marine Radar Owner’s Manual
© Copyright 2005 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. Tel. 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. Tel. 44/0870.8501241 Fax 44/0870.8501251 Garmin Corporation No. 68, Jangshu 2nd Road Shijr, Taipei County, Taiwan Tel. 886/2.2642.9199 Fax 886/2.2642.9099 All rights reserved.
INTRODUCTION > ABOUT THIS MANUAL INTRODUCTION About This Manual Congratulations, and thank you for choosing Garmin’s GMR 20/40 Marine Radar. The addition of the GMR 20/40 Marine Radar to your Garmin Marine Network, enhances the capability of your system by adding graphical radar data to your Garmin Marine Network. This manual covers the features and operation of the GMR 20/40 Marine Radar when viewed on the Garmin Marine Network Chartplotters.
INTRODUCTION > TABLE OF CONTENTS Introduction...........................................................................i About This Manual ................................................................... i Terminology used Throughout this Manual ........................... i GMR 20/40 Operation ..........................................................1 Radar Overview ....................................................................... 1 The Radar Page .............................................
GMR 20/40 OPERATION > RADAR OVERVIEW—THE RADAR PAGE GMR 20/40 OPERATION Radar Overview The Garmin GMR 20/40 Radar Scanner transmits a narrow beam of microwave energy in a rotating 360° pattern. When the transmitted energy contacts a target, some of that energy is reflected and returned to the scanner. The scanner collects the returned energy for processing and display. The GMR 20/40 is operated and adjusted using the controls on your Gamin chartplotter.
GMR 20/40 OPERATION >THE RADAR PAGE In the Status Bar at the top of the Radar page, the message “Radar Warming Up” is displayed with a countdown to Standby Mode. The countdown to Standby Mode is also displayed in the middle of the radar display. When the countdown reaches zero, the message “Hold FCTN to transmit” is displayed. As a safety feature, the scanner enters Standby Mode after it is warmed up.
GMR 20/40 OPERATION > RADAR PAGE LAYOUT 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 the user to quickly access functions and change settings may be displayed along the bottom of the page.
GMR 20/40 OPERATION > RANGE RINGS—HEADING LINE—DIGITAL NAVIGATION DATA Range Rings The Range Rings are used as an aid to quickly determine 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.
GMR 20/40 OPERATION > THE RADAR CONFIGURATION PAGE—THE RADAR ADJUSTMENT MENU 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 on “Configuring the Main Pages.” To display the Radar Configuration page: Press and hold the DATA\CONFIG key.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU continued To change a Radar Adjustment Menu setting: 1. Press the ADJ key to display the Adjustment Menu. 2. Using the ARROW KEYPAD or DATA ENTRY keys, select an option. If using the ARROW KEYPAD to highlight an option, press the ENTER key to display the adjustment for that selection. 3. Using the ARROW KEYPAD, make the desired change, then press the ENTER key to accept the change. Gain Selecting Gain, displays the Gain Adjustment Slider.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU To change the Sea Clutter setting: 1. Using the ARROW KEYPAD, move the slider to a preset or other position. 2. Press the ENTER key to accept the change. The preset positions can also be selected using the Soft Key options. Rain Clutter Rain Clutter is screen clutter caused by rain. Adjusting the Rain Clutter setting can help remove screen clutter caused by rain at close ranges. Selecting Rain Clutter displays the Rain Clutter Adjustment Slider.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU Zoom When a Zoom level is selected, a box showing a zoomed portion of the screen is displayed. When Move is selected, the ARROW KEYPAD can be used to move the box around the screen. The Zoom setting has four presets: Off, 2x, 4x, and Move. To change the Zoom setting: 1. Using the ARROW KEYPAD, highlight the desired setting. 2. Press the ENTER key to accept the change. Target Expansion Target Expansion increases the size of a target.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU Trails Trails are history trails that show movement of a target. When Trails is On, all returns on the display leave a history trail. The Trails setting determines the length of the trail. The Trails setting has four presets: Off, Short, Medium, and Long. To change the Trails setting: 1. Using the ARROW KEYPAD, highlight the desired setting. 2. Press the ENTER key to accept the change.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU To Define a Guard Zone: 1. Using the ARROW KEYPAD, highlight Show Guard Zone 1/2 and press the ENTER key. 2. Using the ARROW KEYPAD, highlight Adjust and press the ENTER key. 3. Using the ARROW KEYPAD, define the desired area on the Radar page. 4. Press the ENTER key to accept the change. With a Guard Zone selected on the Radar page, Soft Key options may be available. The diameter of the VRM and the angle of the EBL are adjustable. To adjust the VRM/EBL: 1.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU To move the center location of the VRM: 1. Using the ARROW KEYPAD, highlight Move and press the ENTER key. 2. Using the ARROW KEYPAD, move the center point of the VRM to the desired location. 3. Press the ENTER key to set the new location. 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.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU While a target is being designated, a box is placed around the target. When MARPA begins tracking the target, the box is replaced with the appropriate symbol. Acquiring Target To display the MARPA List: Using the ARROW KEYPAD, highlight MARPA List and press the ENTER key.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU Own Vessel Safe Zone—is a circular area defined by a range setting that is centered on your own vessel. If a target enters the defined area an alarm is sounded. The Safe Zone can be set to a distance between .01 and 2 nautical miles. Time To Safe Zone—sounds an alarm if MARPA determines that a target will intersect the Own Vessel Safe Zone within the defined time interval. The time interval settings range from 3 to 24 minutes.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU Map Cursor On/Off The Map Cursor On/Off setting turns the Map Page Cursor On or Off when operating in Split Screen Mode or when using two MFDs. To turn the Map Cursor On/Off: Using the ARROW KEYPAD, highlight Map Cursor On/Off and press the ENTER key. Setup Selecting Setup displays the Radar Setup Menu. The Radar Setup Menu contains four sub-tabs: General, Display, MARPA, and Advanced.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU Front of Boat Offset—this setting is used to correct for any alignment error that may have occurred during installation of the scanner. The scanner is directional. For optimal performance it needs to be pointed directly ahead of the boat. To verify that the scanner is properly aligned, point the bow of the boat directly at a stationary object such as a buoy. Check the radar screen to verify that the object is shown directly ahead of the boat.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU Center Offset—has three settings: Center, Look Ahead, and Auto Shift. Center places your current location in the center of the display. Look Ahead shifts your current location toward the bottom of the display, allowing you to view an area farther ahead. Auto Shift adjusts your location on the display according to the current speed. Rings—is used to turn the radar Range Rings On or Off. Background—is used to select a background color for the Radar page.
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU—MAP PAGE RADAR OVERLAY To select an AFC Mode: 1. Using the ARROW KEYPAD, highlight the AFC Mode field and press the ENTER key. 2. Using the ARROW KEYPAD, highlight the desired selection and press the ENTER key. To manually adjust the scanner frequency: 1. Using the ARROW KEYPAD, highlight the Freq button and press the ENTER key. 2. Using the ARROW KEYPAD, adjust the scanner frequency up or down to achieve the desired effect. 3.
GMR 20/40 OPERATION > MAP PAGE RADAR OVERLAY Map page Radar Options 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. To display the Radar Options: 1. Press the ADJ key. 2. Using the ARROW KEYPAD, highlight Radar Options and press the ENTER key.
APPENDIX > EUROPEAN LICENSE REQUIREMENTS APPENDIX European License Requirements Austria I Luxembourg Belgium G The Netherlands Czech Republic I Poland Denmark G Portugal Estonia * Slovakia Finland I Slovenia France G Spain Germany G Sweden Greece G United Kingdom Hungary * Cyprus Ireland * Malta Italy G Iceland Latvia I Norway Lithuania G Switzerland I—Requires an individual license for operation. I I G G * G * G I G * G I I G—can be operated under a general license or license exemption.
APPENDIX > SPECIFICATIONS Specifications Sensitivity and Tune Controls: Gain, Sea Clutter, Rain Clutter, Frequency Tune. Radar Scanner Weight: Unit 26 lbs; cable 8.35 lbs. Radar/Chart Synchronization: Overlay Mode. Split overlay with standard radar presentation. Unit Dimensions: 28” (710 mm) D x 8” (205 mm) H. 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 20: 2 kW / GMR 40: 4kW.
APPENDIX > FCC COMPLIANCE FCC Compliance The GMR 20/40 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.
APPENDIX > SOFTWARE LICENSE AGREEMENT / LIMITED WARRANTY Software License Agreement BY USING THE GMR 20/40, 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.
APPENDIX > LIMITED WARRANTY 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.
APPENDIX > WARNINGS AND CAUTIONS Warning and Cautions CAUTION: Use the GMR 20/40 at your own risk. To reduce the risk of unsafe operation, carefully review and understand all aspects of this Owner’s Manual, and thoroughly practice operation using the simulator Mode prior to actual use. When in actual use, carefully compare indications from the GMR 20/40 to all available navigation sources, including the information from other NAVAIDs, visual sightings, charts, etc.
Index A About This Manual i Adjustment 5 Adjustment Menu 5 Advanced Tab 16 AFC Mode 16, 17 B Background 16 Background color 15 Bearing Line 16 Bearing Reference 15, 16 Begin Transmitting 17 Begin Transmitting.
INDEX V Variable Range Marker 10 Vector Length 13 Velocity Reference 13 VRM/EBL 5, 10 W Warming Up 2 Warning and Cautions 24 WARRANTY 22 Waypoints 16 Z Zoom 5, 8 Zoom level 8 Zoom Scale 3 26 GMR 20/40 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. © Copyright 2005 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. Garmin (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL, U.K. Garmin Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan www.garmin.com Part Number 190-00457-00 Rev.
