Garmin GPSMAP 421 Reviews

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4.00 based upon 1 reviews

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Garmin GPSMAP 421 Reviews


.... October 29th, 2011


Garmin421s

I like this unit. I got the 421s instead of ant of the others in the series because I wanted the functionality of the VISION card, so saw no reason to pay extra to have maps preloaded that would be supplanted by the card I had to buy anyway.

I mounted this in the main bulkhead of my O'Day 23 sailboat. (My boat already had a thru-hull mount, so I got the thru-hull sounder.) I like having speed over ground, compass heading, depth and current chart location all on the screen at one time. I am currently trying to tie it into my Standard Horizon VHF via the NMEA 1083 harness.


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Manuals / Documents
Download any of our Garmin GPSMAP 421 manuals for free!

We have the following 8 documents available for the Garmin GPSMAP 421:
  • Owner's Manual
  • Important Safety and Product Information
  • Technical Reference for Garmin NMEA 2000 Products
  • Flush Mount Kit Instructions (Multilingual)
  • Installation Instructions
  • Flush Mount Template (Multilingual)
  • Quick Reference Guide
  • ML Declaration of Conformity
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