GPSMAP® 421

Part Number: 010-00764-00

Overview

The GPSMAP 421 is a compact chartplotter that features an ultra-bright 4" (10.16 cm) QVGA color display along with an improved high-speed digital design for increased map drawing and panning speeds. It’s ready to go with a built-in, satellite-enhanced worldwide basemap and an easy-to-use interface designed to help you navigate the open waters with ease. The GPSMAP 421 also accepts BlueChart® g2 Vision® cards (sold separately) for added features and functionality such as high-resolution satellite imagery, 3-D views and Auto Guidance technology.

View Satellite-enhanced Worldwide Basemap

The GPSMAP 421 basemap contains worldwide satellite images in place of traditional maps. The GPSMAP 421 also comes standard with a high-sensitivity GPS receiver for superior satellite tracking and quicker acquisition times. In addition, the GPSMAP 421 can receive U.S. graphical weather data via optional GXM™ 51 satellite receiver/antenna. And with an SD™ card slot, it’s easy to add additional maps without connecting to a computer.

Add Extras with BlueChart g2 Vision

With the optional BlueChart g2 Vision SD card, you can add a whole new dimension of exceptional features to your chartplotter.

  • MarinerEye view and FishEye view provide you a 3-D perspective of map information, both above and below the waterline.
  • High-resolution satellite images and aerial photographs help you orient yourself in unfamiliar areas.
  • Auto Guidance technology searches through all relevant charts to create a route you can actually follow — one that avoids obstacles, shallow water, buoys and other obstructions.
BlueChart g2 Vision Compatible NMEA 2000 Compatible XM Satellite Weather WAAS enabled

Specs

Physical & Performance

Physical dimensions 5.7" x 5.0" x 2.7" (14.5 x 12.7 x 6.9 cm)
Display size, WxH

2.4" x 3.2"; 4.0" diagonal

(6.1 x 8.1 cm; 10.2 cm diagonal)

Display resolution, WxH 240 x 320 pixels
Display type QVGA display
Weight 1.3 lbs (590 g)
Water rating IPX7
Antenna Internal with external connection
NMEA 2000® compatible
NMEA 0183 compatible
SiriusXM™ Weather & Radio compatible
Power consumption

Max power usage at 13.8 Vdc: 15 W

Typical current draw at 12 Vdc: 0.5 A

Mounting options Bail with swivel or flush
Garmin Marine Network™ ports None

Maps & Memory

Preloaded maps None
Accepts data cards 1 SD™ card
Waypoints 3,000
Routes 100
Track log 10,000 points; 50 saved tracks

Chartplotter Features

Supports AIS (tracks target ships position)
Supports DSC (displays position data from DSC-capable VHF radio)
Tide tables

Connections

NMEA 0183 input ports 2
NMEA 0183 output ports 2
Video input ports None
Video output ports None

In the Box

  • GPSMAP 421
  • Tilt/swivel mount
  • Protective front cover
  • Power/data cable
  • Documentation

Maps

Maps for New Regions

Need maps for other regions? See all maps that are compatible with this device.

Need a map update?

Update the maps that came with your device for the best navigation experience.

Check for Updates

Accessories

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