Garmin GMR 21 Owner's Manual
  1. Manuals
  2. Brands
  3. Garmin Manuals
  4. Marine Radar
  5. GMR 21
  6. Owner's manual

Garmin GMR 21 Owner's Manual

Garmin marine radar owner's manual model gmr 21/41
Hide thumbs Also See for GMR 21:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Instruction and Installation Manual, Installation Manual
Owner's Manual
GMR 21/41
marine radar

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the GMR 21 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Garmin GMR 21

Summary of Contents for Garmin GMR 21

  • Page 1 Owner’s Manual GMR 21/41 marine radar...
  • 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 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.

  • Page 4: Table Of Contents

    ABLE OF ONTENTS Introduction ...i About This Manual ... i Terminology used Throughout this Manual ... i GMR 21/41 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 21/41 Operation

    The scanner collects the returned energy for processing and display. The GMR 21/41 is operated and adjusted using controls on the Gamin chartplotter. Radar data is presented on a dedicated Radar Page or as an overlay on the Map page.
  • Page 6 Before beginning radar transmission, verify that the area around the scanner is clear. The GMR 21/41 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 quick access to radar functions and setting changes are displayed along the bottom of the page. Status bar Range rings Digital Heading line navigation data Zoom scale Soft key options Ring separation GMR 21/41 Owner’s Manual...

  • 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 21/41 Owner’s Manual...

  • Page 9: The Radar Configuration Page

    Page. Please refer to the GPSMAP 3000 series owner’s manual for information about “Configuring the Main Pages.” To display the Radar Configuration Page: Press and hold DATA\CONFIG. Radar Configuration Page GMR 21/41 Owner’s Manual PERATION ADAR ONFIGURATION The Radar Adjustment Menu...

  • Page 10: Gain

    Adjusting the Sea Clutter setting can help eliminate any unwanted screen clutter caused by choppy sea conditions. Selecting Sea Clutter displays the Sea Clutter adjustment slider. The slider has three preset positions: Calm, Moderate, and Rough. GMR 21/41 Owner’s Manual...

  • Page 11: Rain Clutter

    To change the Rain Clutter setting: 1. Use the Rocker to move the slider to the desired setting. 2. Press ENTER to accept the change. GMR 21/41 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 or Off: 1. Use the Rocker to highlight On or Off. 2. Press ENTER to accept the change. Target Expansion Off Target Expansion On GMR 21/41 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 21/41 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

    Line around the center point of the VRM. 3. Press the Rocker up or down to increase or decrease the size of the Variable Range Marker. 4. Press ENTER to accept the changes. Variable Range Marker Electronic Bearing Line (VRM) (EBL) GMR 21/41 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 GMR 21/41 Owner’s Manual performance. Each target being tracked by MARPA is represented by a symbol. The symbols indicate the current state of the target.

  • Page 16: Marpa Setup

    PERATION ADAR DJUSTMENT 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: Use the Rocker to highlight MARPA List and press ENTER. Tracking Target MARPA Setup The MARPA Setup Menu contains settings for Vector Length, Target...

  • 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 21/41 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

    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 21/41 Owner’s Manual...

  • Page 19: The Display Tab

    Transmit XMIT Time. When the radar is standing by, the scanner does not rotate or transmit; however, power is still applied to the Magnetron, eliminating the need for a warm-up cycle. GMR 21/41 Owner’s Manual PERATION The Display Tab The Display tab contains settings for Center Offset, Rings, Background color, Heading Line, Bearing Reference, and Navigation Features.

  • 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 21/41 Owner’s Manual...

  • Page 21: Enter Standby/Begin Transmitting

    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 21/41 Owner’s Manual PERATION To select Enter Standby or Begin Transmitting: Use the Rocker to highlight the Enter Standby or Begin Transmitting, and press ENTER.
  • Page 22 Radar Page. To display the Radar Options: 1. Press ADJ/MENU. 2. Use the Rocker to highlight Radar Options, and press ENTER. VERLAY Radar Page Map Page Radar Options GMR 21/41 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 21/41 Owner’s Manual PPENDIX UROPEAN ICENSE...

  • Page 24: Specifications

    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 Source: 10–35 VDC, 28W. Operating Temperature Range: -25°C to 70°C, and a relative humidity up to 95% at 35°C...

  • Page 25: Fcc Compliance

    FCC Compliance The GMR 21/41 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

    Failure to avoid the following potentially hazardous situations may result in injury or property damage. Use the GMR 21/41 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.
  • Page 29 Gain Heading Sensor Clear Trails Hide/Show Navigation Features Configuration Course Line highlight Cross-talk Rejection Limited Warranty GMR 21/41 Owner’s Manual Manually Adjust the Scanner 3, 4 Map Cursor Map Cursor On/Off Map Page Radar Overlay MARPA 5, 11 MARPA function...
  • Page 30 NDEX Variable Range Marker Vector Length Velocity Reference VRM/EBL 5, 10 Warming Up WARRANTY Waypoints Zoom 5, 8 Zoom level Zoom Scale GMR 21/41 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 2006 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151 Street, Olathe, Kansas 66062, U.S.A.

This manual is also suitable for:

41Gmr 41

Table of Contents

Save PDF