Máy định vị vệ tinh Garmin GPSMAP 420/420s
Garmin GPSMAP 420/420s 
The GPSMAP 420 is a sleek, space-saving chartplotter that features an ultra-bright 4” QVGA display; built-in, satellite-enhanced worldwide basemap and simplified user operation. The 420 also has an SD™ card slot so you can add additional features with the optional BlueChart® g2 Vision card.

View Satellite-enhanced Maps

The 420’s basemap contains worldwide satellite images in place of more traditional maps, and its SD card slot makes it easy to add additional maps without connecting to a computer. With fewer keys and a simple, intuitive interface, the 420 makes navigating your way through the water easy.

Add Sonar

Where applicable, the sounder version, GPSMAP 420s, comes with a powerful dual frequency transducer that clearly paints depth contours, fish targets and structure whether you’re fishing in freshwater or off the coast. The 420 and 420s are also CANet™ compatible, so you can share sounder data with another chartplotter on your boat.

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-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.

For a low cost option try BlueChart g2 cards.

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: no
Antenna: internal
NMEA input/output: NMEA 0183

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: 1,500
Routes: 20
Track log: 10,000 points; 20 saved tracks
Features: Garmin radar compatible: no
Garmin sonar compatible: yes
CANet® compatible: yes
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. & Canada compatible:  no
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