Garmin GMR 20 Owner's Manual
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Garmin GMR 20 Owner's Manual

Garmin gmr 20/40 marine radar owner's manual
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GMR 20/40
Marine Radar
Owner's Manual

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  • Page 1 GMR 20/40 Marine Radar Owner’s Manual...
  • Page 2 Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content 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.

  • Page 3: About This Manual

    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.

  • Page 4: Table Of Contents

    ABLE OF ONTENTS Introduction ...i About This Manual ... i Terminology used Throughout this Manual ... i GMR 20/40 Operation ...1 Radar Overview ... 1 The Radar Page ... 1 Radar Page Layout ... 3 Range Rings ... 4 Heading Line ... 4 Digital Navigation Data ...

  • Page 5: Gmr 20/40 Operation

    GMR 20/40 O PERATION 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.
  • Page 6 Before beginning radar transmission, verify that the area around the scanner is clear. The GMR 20/40 transmits a beam approximately 12° above and below a line extending horizontally from the center of the scanner.

  • Page 7: Radar Page Layout

    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. Status Bar Range Rings Heading Line Zoom Scale Ring Separation GMR 20/40 Owner’s Manual GMR 20/40 Owner’s Manual PERATION ADAR AYOUT Digital Navigation...

  • Page 8: Range Rings

    fields. The Radar page can be configured to show two columns of data with up to seven data fields each. Each data field can be configured to show a variety of data. 3/4 nm 1/2 nm 1/4 nm GMR 20/40 Owner’s Manual...

  • Page 9: The Radar Configuration 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. Radar Configuration Page GMR 20/40 Owner’s Manual GMR 20/40 Owner’s Manual PERATION ADAR ONFIGURATION...

  • Page 10: Gain

    Sea Clutter is screen clutter caused by choppy sea conditions. Adjusting the Sea Clutter setting can help eliminate the screen clutter. Selecting Sea Clutter displays the Sea Clutter Adjustment Slider. The slider has three preset positions: Calm, Moderate, and Rough. GMR 20/40 Owner’s Manual...

  • Page 11: Rain Clutter

    1. Using the ARROW KEYPAD, move the slider to the desired setting. 2. Press the ENTER key to accept the change. GMR 20/40 Owner’s Manual PERATION FTC (Fast Time Constant) Adjusting the Fast Time Constant can help eliminate distant screen clutter caused by rain.

  • Page 12: Zoom

    4 nm or greater. To turn Target Expansion On/Off: 1. Using the ARROW KEYPAD, highlight the desired setting. 2. Press the ENTER key to accept the change. Target Expansion - Off Target Expansion - On GMR 20/40 Owner’s Manual...

  • Page 13: Trails

    Trails - On (medium) To clear the Trails, select Clear Trails on the Adjustment Menu or press the Clear Trails Soft Key. GMR 20/40 Owner’s Manual PERATION Guard Zone A Guard Zone is a user defined area of protection. If a target enters the defined Guard Zone, an alarm is sounded.

  • Page 14: Vrm/Ebl

    Bearing Line around the center point of the VRM. 3. Press the ARROW KEYPAD up/down to increase/decrease the size of the Variable Range Marker. 4. Press the ENTER key to accept the changes. Variable Range Marker Electronic Bearing Line (VRM) (EBL) GMR 20/40 Owner’s Manual...

  • Page 15: Marpa

    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. GMR 20/40 Owner’s Manual PERATION Acquiring Target Target is Safe...

  • Page 16: Marpa Setup

    The MARPA Setup Menu contains settings for Vector Length, Target History, Own Vessel Safe Zone, Tine To Safe Zone, Safe Ring Zone, and Velocity Reference. To display the MARPA Setup Menu: Using the ARROW KEYPAD, highlight MARPA Setup and press the ENTER key. MARPA List GMR 20/40 Owner’s...

  • Page 17: Hide/Show Navigation Features

    .05 minutes to 60 minutes. Target History—is a trail showing a targets movement. Target History can be turned On or Off. GMR 20/40 Owner’s Manual PERATION Own Vessel Safe Zone—is a circular area defined by a range setting that is centered on your own vessel.

  • Page 18: Map Cursor On/Off

    Modes: Heading Up, North Up, or Course Up. Cross-talk Rejection—radar cross-talk may occur when two or more radar equipped vessels are operating in proximity to one another. Cross-talk rejection automatically filters out the cross-talk interference. The General Tab GMR 20/40 Owner’s Manual...

  • Page 19: The Display Tab

    For example, if set to 01min, the radar transmits for a period of one minute before referring to the Timed Transmit STBY Time. GMR 20/40 Owner’s Manual PERATION Timed Transmit STBY Time—this setting determines a time interval in minutes that the radar is in stands by.

  • Page 20: The Marpa Tab

    The MARPA Tab See MARPA Setup on page 12. The Advanced Tab AFC Mode—has two settings, Auto, and Manual. In Auto Mode the scanner frequency is automatically adjusted for optimal performance and is recommended. The Advanced Tab GMR 20/40 Owner’s Manual...

  • Page 21: Enter Standby/Begin Transmitting

    Magnetron. If the scanner is in Standby Mode, Begin Transmitting is enabled. Selecting Begin Transmitting removes the scanner from Standby Mode and after “Spinning Up” the scanner begins transmitting. GMR 20/40 Owner’s Manual PERATION ADAR DJUSTMENT...
  • Page 22 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. VERLAY Radar page Map page Radar Options GMR 20/40 Owner’s Manual...

  • Page 23: Appendix

    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. Please refer to the national radio or telecommunications office or ministry. GMR 20/40 Owner’s Manual PPENDIX UROPEAN ICENSE...

  • Page 24: Specifications

    Radar Scanner Weight: 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 20: 2 kW / GMR 40: 4kW.

  • Page 25: 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.

  • Page 26: Software License Agreement

    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.
  • Page 27 EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY. To obtain warranty service, contact your local Garmin authorized dealer. Or call Garmin Product Support at one of the numbers shown below, for shipping instructions and an RMA tracking number. The unit should be securely packed with the tracking number clearly written on the outside of the package.

  • Page 28: Warning And Cautions

    ARNINGS AND AUTIONS 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...
  • Page 29 Hide/Show Navigation Features 5 Configuration 5 Course Line 16 Highlight i Cross-talk Rejection 14 Limited Warranty 22 GMR 20/40 Owner’s Manual Radar Page 1 Radar Page Layout 3 Manually Adjust the Scanner 17 Radar Warming Up 2 Map Cursor 13...
  • Page 30 NDEX Variable Range Marker 10 Vector Length 13 Velocity Reference 13 VRM/EBL 5, 10 Warming Up 2 Warning and Cautions 24 WARRANTY 22 Waypoints 16 Zoom 5, 8 Zoom level 8 Zoom Scale 3 GMR 20/40 Owner’s Manual...
  • Page 32 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 151 Street, Olathe, Kansas 66062, U.S.A.

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40Gmr 40

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