Garmin GPSMAP 421

The GPSMAP 421 is a compact chartplotter that features an ultra-bright 4” 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 for added features and functionality such as high-resolution satellite imagery, 3D 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.

•3D Mariner’s and Fish Eye view provides you with a 3-dimensional 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

GPSMAP 421 Features

• Ultra-bright 4” diagonal QVGA display, 240 x 320 pixels – over 800 nits of brightness
• NMEA 2000 certified for seamless integration with the Garmin marine lineup
• Preloaded worldwide marine basemap
• Compatible with GXM™ 51 for XM Satellite Radio and XM WX Satellite Weather
• Built-in high-sensitivity GPS receiver
• High-speed processor for fast screen redraws and smooth panning
• Streamlined user interface makes it simple to select modes and features
• Single SD™ memory card slot for BlueChart g2 Vision cards, as well as saving waypoints, routes and tracks to a SD card
• Optional BlueChart g2 Vision cards provide marine chart detail and enhanced navigation features like Auto Guidance, satellite imagery, 3-D Mariner’s Eye View and 3-D Fish Eye View
• Backlit keypad for easy operation in low light conditions
• Unit dimensions: 5.0”H x 5.7”W x 2.7”D (12.7cm H x 14.5cm W x 6.9cm D)

Maps & Software Options

Click here for products compatible with this unit

What's in the Box

GPSMAP 421
Tilt/swivel mount
Protective front cover
Power/data cable
Owner's manual

Physical & Performance

Unit dimensions, WxHxD: 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 lb (590 g)
Battery: none
Battery life: none
Waterproof: yes (IPX7)
High-sensitivity receiver: yes
Antenna: internal
NMEA input/output: NMEA 0183 compatible and NMEA 2000 certified

Maps & Memory

Basemap: yes
Preloaded maps: no
Ability to add maps: yes
Built-in memory: none (cannot load maps to internal memory)
Accepts data cards: SD™ card slot
Waypoints/favorites/locations: 3,000
Routes: 100
Track log: 10,000 points; 50 saved tracks

Features

Garmin radar compatible: no
Garmin sonar compatible: yes
CANet® compatible: no
Garmin Marine Network™ compatible: no
Touchscreen: no
Supports AIS (tracks target ships' position): yes
Supports DSC (displays position data from DSC capable VHF radio): yes
Audible alarms: yes
Tide tables: yes
Hunt/fish calendar: no
Sun and moon information: yes
3-D map view: yes (with optional BlueChart g2 Vision card)
Auto Guidance: yes (with optional BlueChart g2 Vision card)
Automatic routing (turn by turn routing on roads): no
XM WX Weather & Radio for U.S. compatible: yes
Voice prompts (e.g. "Turn right in 500 ft."): no
Speaks street names (e.g. "Turn right ON ELM STREET in 500 ft."): no
Remote control: no
Headphone jack/audio line-out: no
Audio/video input/output: no
Portable: no
Automotive/motorcycle-friendly: no

Support for this Garmin product

Tech Support: 1-800-800-1020
Online: Garmin Support