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Garmin GPSMAP 740/740s Chartplotters

Discontinued. Replaced by the GPSMAP 741 and 741xs >>

GPSMAP 740 is a stand-alone touchscreen chartplotter that brings a new level of functionality to your vessel. Featuring a brilliant 7-inch display, GPSMAP 740 puts all the information you need right at your fingertips. GPSMAP 740 is preloaded with U.S. coastal maps. In addition, GPSMAP 740 accepts radar input and offers full NMEA 2000® connectivity for greater convenience when adding extra sensors.

Explore the Seas

GPSMAP 740 contains preloaded map data for all U.S. coastal areas, including Alaska and Hawaii, plus Explorer Charts for the Bahamas. GPSMAP 740 also features an internal, high-sensitivity GPS receiver for superior satellite tracking and quicker acquisition times. And as an added benefit, GPSMAP 740 can receive graphical weather data for North America through the optional GXM™ 51 satellite receiver/antenna.

Take Control by Touch

Input is easy with GPSMAP 740. Whether you’re changing course or simply reviewing information in front of you, the intuitive touchscreen interface makes for simple operation. The device also offers flexible brightness levels for daytime readability along with low-light dimming during night use. And with a widescreen display that’s rugged and waterproof, it’s made to perform in any situation.

Expand with Radar

Featuring a built-in radar port, GPSMAP 740 can be interfaced with Garmin’s line of affordable GMR™ marine radar systems. Whether you’re adding radar now or in the future, you’ll enjoy the convenience of “plug-and-play installation” as well as the power, range and high-definition targeting of our proven radar offerings.¹

Add Sonar with GPSMAP 740s

GPSMAP 740s comes standard with a 1kW-capable sonar transceiver. This powerful sonar can help you define fish targets and underwater structures as far down as 2,000 feet when used with a 1kW transducer.²

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 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.

¹Garmin Marine Network not supported.

²Depth capacity is dependent on water salinity, bottom type and other water conditions (with 1 kW transducer).

Garmin GPSMAP 740/740s Features & Specifications:

GPSMAP 740 and GPSMAP 740s
• Brilliant, crisp 7” diagonal WVGA touchscreen display (800 x 480), 16:9 aspect ratio – over 1000 nits of brightness
• Add optional Garmin marine radar using the built-in radar port
• NMEA 2000 certified for seamless integration with the Garmin marine lineup
• Built-in high-sensitivity GPS receiver
• Preloaded worldwide marine basemap
• Compatible with GXM 51 for XM Satellite Radio and XM WX Satellite Weather
• Streamlined user interface makes it simple to select modes and features
• Single SD™ memory card slot for BlueChart g2 and 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
• Cleaner installation thanks to the newly designed bail mount with cable management capabilities
• Two NMEA 0183 ports
• Unit dimensions: 8.8"W x 5.6"H x 3.1"D (22.4 cm W x 14.2 cm H x 7.9 cm D)
• Unit weight: 2.48 lbs (1.1 kg)

• Same features as listed above
• Power output: 1000 watts (RMS) 8000 watts (peak to peak), 1kW transducer
                      500 watts (RMS) 4000 watts (peak to peak), dual frequency transducer
• Depth: 2,000 feet / 600 meters (dual frequency, 1kW transducer), 1,500 ft (dual frequency, 500 kW transducer)
• UltraScroll® high rep rate sonar provides lightning-fast screen updates
• AutoGain technology enhances target visibility
• UltraScroll® high rep rate sonar provides lightning-fast screen updates
• See-Thru® technology: shows weak and strong returns simultaneously
• Water temperature log graphically records water temp data
• A-scope
• Adjustable depth line helps gauge desired fishing levels and bottom clearance
• Split zoom display offers a closer look at fish targets and bottom structure
• 2X, 4X, bottomlock zoom – plus, a new manual zoom feature for greater control over the magnification of the sonar image
• Alarms for fish size, shallow water, deep water and low battery
• Adjustable keel offset

Physical & Performance:
Unit dimensions, WxHxD:
8.8" x 5.6" x 3.1" (22.4 x 14.2 x 7.9 cm)
Display size, WxH:
6.0" x 3.6", 7.0" diagonal (15.2 x 9.1 cm, 17.8 cm diagonal)
Display resolution, WxH:
800 x 480 pixels
Display type:
WVGA display
2.48 lb (1.1 kg)
Battery life:
yes (IPX7)
High-sensitivity receiver:
NMEA input/output:
NMEA 0183 compatible and NMEA 2000 certified
Maps & Memory:
Preloaded maps:
yes (coastal U.S. maps)
Ability to add maps:
Built-in memory:
none (cannot load maps to internal memory)
Accepts data cards:
SD™ card slot
Track log:
20,000 points; 50 saved tracks
Garmin radar compatible:
Garmin sonar compatible:
yes (included with 740s)
Garmin Marine Network™ compatible:
Supports AIS (tracks target ships' position):
Supports DSC (displays position data from DSC capable VHF radio):
Audible alarms:
Tide tables:
Hunt/fish calendar:
Sun and moon information:
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):
XM WX Weather & Radio for U.S. compatible:
Voice prompts (e.g. "Turn right in 500 ft."):
Speaks street names (e.g. "Turn right ON ELM STREET in 500 ft."):
Remote control:
Headphone jack/audio line-out:
Audio/video input/output:
View Cart
user's manual
g2 vision data cards

what is WAAS?bluechart g2 vision

NMEA 2000 CertifiedXM Satellite Weather Enabled

Garmin GPSMAP 740/740s

Package Includes:
• GPSMAP 740/740s
• Top and bottom snap covers
• Bail mount with built-in cable management
• Knobs
• Flush mount gasket and hardware
Threaded power/data cable (740)
Threaded power/data/sonar cable (740s)
Protective cover



Garmin GPSMAP 740/740s screenshot


Garmin GPSMAP 740/740s screenshot


Garmin GPSMAP 740/740s screenshot


Garmin GPSMAP 740/740s screenshot

Compatible Charts & Maps

Marine/Lake Charts
g2 microSD
g2 Visions microSD
g2 Visions US Inland Lakes
Canada LakeVu HD Ultra
Canada LakeVu HD

Topo Maps
Topo Canada Regions on microSD cards
Topo Canada on DVD
Topo US 24K download card
Topo US 24K on DVD
Topo US 100K on microSD
Topo US 100K on DVD


garmin g2 visionBlueChart g2 Vision
All the new Garmin chartplotters feature basic worldwide satellite imagery for a realistic "view from space" depiction. With optional g2 Vision cards, these images are upgraded to super high-detail aerial photomapping. It's the most realistic map you've ever seen on a graphical chartplotter. And you can navigate 'on the picture' with a clear dynamic presentation of your boat's current position.

Auto Guidance. The optional Auto Guidance technology, unlocked via g2 Vision card, searches chart contents to suggest the safest known charted route for navigation.

True 3D-view mapping. Garmin's newest chartplotters wil graphically depict true 3D "mariner's eye" topside view or "fish eye" underwater view navigation perspective for tricky shoals, reefs, bridges, channels etc.

"Real Picture" Photo Reference. Aerial photography gives mariners a realistic visual overview of harbours, marinas, waterways and other points of reference. The photos allow a visual reference for nearby fuel pumps, dining spots, lodging and shore-side facilities. Also included is City Navigator North America NT road data for navigation up to five miles inland.


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