Garmin GPSMAP 421s 010-00764-01 User Manual
Product codes
010-00764-01
GPSMAP 400/500 Series Owner’s Manual
Getting Started
Getting Started
Unit Overview
POWER/
BACKLIGHT
MENU
ROCKER
SELECT
HOME
RANGE (-/+)
MARK
SD card slot
GPSMAP 526 shown
GPSMAP 421/451/
521/551
GPSMAP 526/556
Power/Data
External
GPS antenna
NMEA 2000
®
Power/Data
External
GPS antenna
NMEA 2000
®