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GMR 21/41 Marine Radar Installation Instructions

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ELCOME

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. 

If any parts are 

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

Summary of Contents for GMR 21/41

Page 1: ...GMR 21 41 marine radar installation instructions...

Page 2: ...electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto provided that such electronic or printed copy of this manual must contain the complete text of thi...

Page 3: ...n 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 i...

Page 4: ...tial beam width above head height When the scanner is transmitting do not look directly at the antenna at close range eyes are the most sensitive part of the body to electromagnetic energy When proper...

Page 5: ...lder washers in the order show in Figure 3 The supplied M8 x 1 25 x 30 bolts can be used on mounting thicknesses of 5 10 mm 3 8 recommended For surfaces over 10 mm 3 8 locally supplied longer bolts ar...

Page 6: ...cable to the RJ 45 socket on the back of the MFD For an expanded network MFD radar GMS 10 attach the RJ 45 marine network cable to an open RJ 45 socket on the GMS 10 network power expander Tighten the...

Page 7: ...t It may be necessary to adjust the bearing of the radar picture shown on the screen First using a magnetic compass take an optical bearing of a stationary target located within viewable range Measure...

Page 8: ...d a relative humidity up to 95 at 35 C Beamwidth Horizontal beamwidth of 3 6 nominal Vertical beamwidth of 25 nominal Range GMR 21 24 nm GMR 41 36 nm Wind Velocity Wind speed up to 100 Kts Antenna RPM...

Page 9: ...GMR 21 41 Marine Radar Installation Instructions 7 Towards Bow 202 0 mm 7 95 610 0 mm 24 02 233 0 mm 9 17 163 5 mm 6 44 141 5 mm 5 57 304 7 mm 12 00...

Page 10: ...ntain chemicals known to the State of California to cause cancer birth defects or reproductive harm This Notice is being provided in accordance with California s Proposition 65 If you have any questio...

Page 11: ...G FROM THE USE MISUSE OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT Some states do not allow the exclusion of incidental or consequential damages so the above limitations may not app...

Page 12: ......

Page 13: ...2 U S A Tel 913 397 8200 Fax 913 397 8282 Garmin Europe Ltd Unit 5 The Quadrangle Abbey Park Industrial Estate Romsey SO51 9AQ U K Tel 44 0870 8501241 Fax 44 0870 8501251 Garmin Corporation No 68 Jang...

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