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Thank you for choosing the Garmin GMR 21/41. The GMR 21/41 utilizes the performance of Garmin radar and provides overlay and color
information when combined with a marine multi-function display (MFD).
Contact Garmin
If you should encounter any difficulty while using your GMR 21/41, or if you have any questions, in the U.S.A. contact Garmin Product
Support by phone: 913/397-8200 or 800/800-1020, Monday thru Friday, 8 am to 5 pm Central Time; or go to www.garmin.com and click on
Product Support. In Europe, contact Garmin (Europe) Ltd. at 44/0870.8501241.
Product Support Registration
Help us better support you by completing our on-line registration today! Have the serial number of your GMR 21/41 handy, and connect to our
Web site (www.garmin.com). Look for the Product Registration link on the Home page. Also, be sure to record your serial number in the area
provided on this page.
Serial Number
Use this area to record the serial number in case it is lost, stolen, needs service, or if you need to contact Product Support. The 8-digit number is
located on the bottom of the unit and on the outside of the product box. It is advisable to record this number prior to installation of the scanner.
Be sure to keep your original sales receipt in a safe place or attach a photocopy inside the manual.
NOTE: The Garmin GMR 21/41 has no user-serviceable parts. If you encounter a problem with your unit, please take it to an authorized Garmin
NMEA dealer or contact Garmin Product Support for repairs.
Packing List
Before installing and getting started with your unit, please check to see that your package includes the following items.
missing, please contact your Garmin dealer immediately.
Standard Package:
• GMR 21 or 41 radar unit
• Power—marine network cable
• Installation manual
• Mount kit hardware
• Grommet for marine cable
GMR 21/41 Marine Radar Installation Instructions
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Serial Number
If any parts are
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