Garmin GPSMAP 740s Chartplotter / Sounder with No Transducer

Priced: $799.99 Rated:   - 4 stars out of 5 by 29 reviews. $799.99
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Garmin GPSMAP 740s Chartplotter / Sounder with No Transducer -

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.

¹Garmin Marine Network not supported.

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

Physical & Performance:
Maps & Memory:
What You’ll Need.

The 50/200 kHz Traditional Transducers - 6 Pins  operate with either 500W, 600W or 1kW transducers, sold separately. Depending on the style of the transducer, you’ll get depth, speed and/or temperature readings. To complete your installation, order one of the following transducers: 

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Garmin GPSMAP 740s Chartplotter / Sounder with No Transducer Reviews:

Positive Reviews:

Great product for the money

I've had the unit on my last 2 boats. The Radar doesn't have overlay, so you can't see land and the rain at the same time. You don't know what your looking at.

As for the unit, it has a very easy user friendley touch screen. The unit has all most no lag, unlike some of the other manafactours, a big plus for zeroing in on bottom structures.

The G2 card really doesn't add much, other then google maps from above, and some other features, but I bought it

I use it with a Airmar P66 transducer, which is 600 watts, and is great for off shore bottom fishing here in Florida.

It is VERY EASY to navigate using the Garmin 740S. Touch the screen, a display pops up, and hit " Navigate to " and it's that easy. Once you do, it will show you at the top of the screen the distance from your target, as well as time of arrival pending on your speed.

I have a Walk Around boat, with a hard fiberglass top, and I flush mounted the unit, with no ext antenna, and it works great, with no loss of receiption.

The 740S ( S- meaning Sounder ), reads sonar, with buying the GSD22 box, and all the other networking componants the bigger units require to buy to read each device. It also reads Radar , and you can buy the GXM51 for weather, and satelite radio !

Over all this units has a ton of features without breaking the bank. I really wanted a bigger screen, like the 4208, but then when you add up the unit, GSD22, and everything else thats required to do what this unit does, your over double the price of this unit, for a extra inch and a quarter.

Great unit for the price, had 2 units over the past 2+ years, and never had a problem with them once!
fltekdiver at on 10/10/2011


Garmin has hit a homerun with the Garmin 740S Chartplotter. The quickest plus one discovers is that it is very user friendly; intuitive is the current word to describe this feature. To use the unit one simply presses the "on" button for 2 seconds which turns on the unit; after approx 20 secs it is ready for you to use, and displays several choices, each in their own screen "box".
Selecting a choice requires only touching the desired box, which brings up that mode.

Scrolling in the chart mode is done with the swipe of a finger. And the chart refreshes quicker than 90% of currently available chartplotters; there's no delay in moving the chart. Zooming "in" or "out" on the chart is done with a finger touch of a "+" or "-" symbol at the bottom of the chart screen.

The charts provided with the 740S are top of the line. I've used them around the coast of Florida AND in the northern Bahamas and the detail is excellent for all these areas. Garmin is second to none with their charts.

The "S" of the 740 denotes built-in Sonar circuitry and their sonar within the 740S is as good as any but the most demanding will require.

A real plus of the Garmin 740 is that the GPS antenna is built into the unit - no external antenna required - the antenna even quickly captures GPS signals through your boats fiberglass so mount the unit where you like and it will play well for you.

Mounting and electrical hookup is simple and straight forward. If you're handy with tools you can do it yourself in an afternoon.

I'm totally satisfied with my selection of the Garmin 740S, after several months usage.
Just An Experienced Boater at on 04/04/2013


I run a 1967 48' steel trawler, 30 tons. This was my first upgrade from the LORAN system - 1 year ago. Used it for a week straight up in the San Juan Islands, fog, etc. with few issues. Periodically, (3x's over a week), the unit would shut down for no reason. I cannot say if it is or is not the unit on my old boat. I also recently had to install a new SIMRAD AP35 autopilot. The chart plotter and autopilot work well together. Great display, excellent navigation and charts – appears very accurate. I added the exterior antenna due to steel bulkheads. Touch screen works well. At first, it was somewhat difficult to use the different tools and options and to program but with use, you get use to it and it actually is pretty easy. I did not yet add the BlueChart g2 Vision chip and feel it is fine without it.
Seafreak at on 06/06/2011

Good unit

I wanted something reliable easy to use and inexpensive. I am new boating in the ct are in the li sound and the rocky shoreline and rocky bays make me nervous. I don't know the area and wanted sometimg that I could point to where I wanted to go and it would safely guide me there. This unit does that. Suggest the card for more detail and auto routing. That's what I needed and for the most part it works great. You need to pay attention though. It was guiding us back to niantic from block island on auto guide and I hit a rock in the sound. The unit showed the rock I just wSnt paying close enough attention. Killed my outdrive. Definitely worth it!
Tom. "No Arguing" at on 09/09/2013

I Like It

This thing is great. The screen works in cold, and the screen is PLENTY big enough. It's perfect for our boat, a 35 foot luhrs alura. We haven't really got much fishing out of it yet since the boat is new (to us), but I had a moment where I saw a mark moving up and the rod went straight down, so it works. We have weather, sonar, chartplotter, and they all work great. It comes off the mount very easily, just unscrew two wires like cable TV type, and unscrew the mount knobs and you're off. Mount is very strong.
cpenrose at on 04/04/2013

Perfect FIt

I primarily use this unit for GPS navigation and depth finder. When using one feature, it works great. When you split the screen for combination use, the screens look small. I bought a second unit and mounted it next to the 1st one and run one view on each screen. For example, I may have sonar on one and GPS on the other. In order to do this you have to set up an NMEA network which will cost you another 100 dollars. Nonetheless, it works great.
Catchingup at on 10/10/2013

A nice upgrade on smaller boats!

We upgraded to the touchscreen, and while we had the dash apart we went ahead and flush mounted this unit. It makes a great addition to smaller boats, Our boat is 24 ft, and is real user friendly. We are starting to think about adding the radar, and the XM weather, which will make a nice all in one package.
Captain Stan at on 12/12/2010

Garmin has great products

These Garmin products are great for clear displays that show mapping contours and are easy to use. We combine the Garmin GPS with a Hot Spots Fishing Chip to return us back to productive Fishing Spots time after time. Ease of use is important and helps me center on catching fish instead of learning the menu of the unit.
Reelimpatient at on 08/08/2013

Location of 740

The 740 is a fabulous touch screen GPS. That said, some idiot Garmin engineer thought it was a good idea to use magnets - yes magnets - to keep the data card door closed.This means that you MUST mount your 740 at LEAST 32 inches from your compass. About the most idiotic design flaw I have seen in years.
MAT at on 12/12/2012

Great navigation sonar system

The GPS was easy to set up and was working instantly. The color display, graphics, and map accuracy are outstanding. This unit is easy to use and the touchscreen is very responsive. I really like the ease of use while underway, everything required to navigate is on one screen and easy to see and use.
fasgd2go at on 03/03/2011

Negative Reviews:

Huge problem - can't be mounted at helm

I bought this as a package with Garmin radar on sale last weekend at a West Marine store. The saleperson -- who claimed to be an experience sailor and recommended it highly -- told me it would be great mounted at the helm iof my sailboat in a NavPod. But when I got the package home and read the installation manual, I learned that the unit can't be mounted closer than 32" from a compass, which means there's no way it can be mounted at the helm of my sailboat without compromising the critical ability to rely on the compass (and with a screen this small, the unit has to be located right at the helm to be readable by anyone over age 35).
After some web searches, I learned that Garmin apparently uses a magnet to keep the door to the card slot closed, and thus the problem with mounting the unit close to the helm compass. Yes, I know the trend is to overly rely on electronics, so I guess Garmin thinks analog, magnetic compasses are just old school navigation instruments that can be dispensed with as obsolete.
This is truly a pathetic design flaw, and I'll be returning it to West. (West should let their salespeople know about this issue -- could have save me a trip!) Too bad, otherwise seemed like a nice product for the price.
Chévere at on 03/03/2011

one year of usage review

The unit worked ok for a while, then it started to shut down without a warning. After a few months of usage it would do that several times a day especially after several touch screen operations! The second big problem - it stopped reading the SD card! I couldn't update the built-in software or use additional mapping. Map of ICW with errors. Maps of Bahamas include areas of no details (several square miles!). Sonar reading turns of when the depth is over 2000 ft, which is normal, but then it doesn't return when entering shallow water - restart required. Overall I was very disappointed with the performace of this unit. Too many problems. Garmin replaced the unit for me (it took 1 month!), but did not offer to extend the warranty. If the new unit is as good as the old one I'l have no way toget it fixed as the warranty will expire soon. It will be close to $2000 spent on a lemon!
Jurek at on 05/05/2011

Over priced and under performs

1- Use of product: I use it as my prime navigation device for my 22 Ft Sea Ray that is docked on the Hudson River.
2- Thing that are great: I cannot come up with one.
3- Things that are not so great:
a- Menu navigation cumbersome.
b- Loss of depth at 15 knots.
c- Useless views other than basic GPS.
d- No time of day on GPS. Even my Tom Tom care GPS does that.
e- Addition maps that you buy for $200+ dollars do nothing. I Called them and they replied that they do not support the Hudson river. What a joke.
The Penguin at on 01/01/2014

Neutral Reviews:

740s Garmin GPS / Sonar

Was considering purchasing this unit until I read the part about the unit needing to be installed at least 32 inches from the compass due to the magnet that holds the chip door closed. Guess Garmin doesn't want customers with Center Consoles. Guess I'll buy another Lorance
Jimmy at on 07/07/2013