GARMIN GPSMAP® 640 Marine & Automotive GPS

GARMIN GPSMAP® 640 Marine & Automotive GPS

Product Code: 640
Availability: In Stock

Price: $501.00


With the Garmin GPSMAP 640, you’ll get a full-featured marine chartplotter and an on-the-road navigator that comes ready to go with preloaded BlueChart® g2 data and City Navigator NT road maps for North America. The GPSMAP 640 comes standard with a high-sensitivity GPS receiver and brilliant, high-resolution touchscreen display so you’ll always know the way whether you’re on land or at sea.

Powerful and Portable

Featuring a marine and an automotive mode, a high-sensitivity GPS receiver, and a rugged case with waterproof (IPX7) design, the GPSMAP 640 is ready for your next outing. The GPSMAP 640 effortlessly shifts gears between marine and automotive modes. When supported by the marine mount, you’ll have at-a-glance access to your marine data. And when placed in the automotive mount, the automotive mode is automatically activated and the GPSMAP 640 becomes a robust street navigator.

Designed to Shine

With a brilliant 5.2-inch WVGA touchscreen display, and an intuitive interface, you’ll have everything you need to navigate with confidence. The GPSMAP 640 comes preloaded with BlueChart g2 data and other surface features as well as City Navigator NA maps that include coverage maps for the United States, Puerto Rico and select parts of Canada.

Stay in the Know

The GPSMAP 640 can receive XM WX satellite weather data in marine mode and XM NavTraffic information in automotive mode with optional GXM 40 antenna and XM subscription. With all that information at your fingertips, you can avoid bad weather at sea or traffic tie-ups on the road. The GPSMAP 640 also supports XM audio so you’ll always have music to enjoy while you’re on the go.

By Sea

In marine mode, the GPSMAP 640 brings you tides and currents, depth contours, navaids, port plans and marine services via preloaded BlueChart g2 marine data. And with optional BlueChart g2 Vision cards, you’ll get 3-D MarinerEye view above the waterline and FishEye view below the waterline. You’ll also benefit from auto guidance technology that searches chart data to suggest the best passage. For a low cost option try BlueChart g2 cards. The GPSMAP 640 is also NMEA 0183 compliant, so it can be easily added to an existing marine network.

By Land

In automotive mode, the GPSMAP 640 announces street names with spoken turn-by-turn directions pulled from the preloaded City Navigator NT road maps for North America. And route planning has never been easier. Whether you’re searching for boat shops or bait shops, you’ll be able to plan the quickest and most efficient route. You can also create custom points of interests (POIs) and set up proximity alerts to let you know what’s in your path as you travel down the road.

Physical & Performance:

  • Unit dimensions, WxHxD: 5.9"W x 4"H x 1.9"D (15.0 x 10.2 x 4.8 cm)
  • Display size, WxH: 4.5"W x 2.7"H (11.4 x 6.9 cm); 5.2" diag (13.2 cm)
  • Display resolution, WxH: 800 x 480 pixels
  • Display type: WVGA
  • Weight: 17.3 ounces (490.4 g)
  • Battery: rechargeable lithium-ion
  • Battery life: up to 9 hours
  • Waterproof: yes (IPX7)
  • High-sensitivity receiver: yes
  • Antenna: internal
  • NMEA input/output: NMEA 0183

Maps & Memory:

  • Basemap: yes
  • Preloaded maps: yes (coastal and detailed road maps)
  • Ability to add maps: yes
  • Built-in memory: internal solid state
  • Accepts data cards: SD™ card slot
  • Waypoints/favorites/locations: 1500 (marine mode); 1000 (automotive mode)
  • Routes: 50 (marine mode); 10 (automotive mode)
  • Track log: 10,000 points, 20 saved tracks (marine mode); 10,000 points, no saved tracks (automotive mode)


  • Garmin radar compatible: no
  • Garmin sonar compatible: no
  • Garmin Marine Network™ compatible: no
  • Touchscreen: yes
  • 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)
  • XM WX Weather & Radio for U.S. & Canada compatible: yes
  • Automatic routing (turn by turn routing on roads): yes
  • Voice prompts (e.g. "Turn right in 500 ft."): yes (12v/speaker)
  • Speaks street names (e.g. "Turn right ON ELM STREET in 500 ft."): yes
  • Headphone jack/audio line-out: yes
  • Audio/video input/output: no
  • Portable: yes
  • Automotive/motorcycle-friendly: yes



Accepts Data Cards SD card slot
Application Automotive, Cruising, Sailing
Battery Life Up to 9 hours
Battery Type Rechargeable Lithium-Ion
Cartography US Basemap
Dimensions 5.9"W x 4"H x 1.9"D
Display Resolution 800 x 480
Display Size 5.2" diag.
Functions Internal GPS Antenna, Touchscreen, Turn by turn navigation
Interface NMEA 0183
Mount Tilt & Swivel
Optional Accessories Compatible: Weather & Radio
Resolution/Color Color WVGA
Type Chartplotter
Warranty 1 Year
Waterproof IPX7


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