Summary: This is an overall great/necessary machine to have on any boat. The chart plotting through the channels is unbelievably accurate. This replaced my Northstar GPS and the display difference and ease of use are uncomparable.
Summary: Well above what I have been using for navigation. I love the adaptability to update and add items like radar, sonar, ais and more detailed charts. The size of the screen is small enough to not dominate my dash and yet large enough for me to see without my glasses. well lit screen. You can split screens or overlay radar over the nav chart, so you don't need to split screens between chart and radar!
Summary: I would like to respond to some confusion created in other reviews. The 740s has excellent built in maps useful for navigation. These internal maps can be transferred to an SD card for use at home with your computer with Homeport software. You do not have to transfer the map every time, but you DO have to have the SD card plugged into your computer to use Homeport. IN ADDITION to the built in maps, one may purchase cards with more detail and more features.
Summary: I love this GPS-Sounder. I bought it from epal.com on sale with a free in hull mount transducer. It has all the features even the professional Captains need. The only negative is it uses magnets to hold the sim card door closed, so you cannot mount it within 32 inches of your compass.(Read installation guide) I don't use my compass now, why would I need it with a GPS, but the magnets do cause true north reading errors. Garmin has out done themselves with this one.
Summary: Pretty good unit for the price. Only one problem I've found with it. I mounted mine in my sailboat and if you stop, and back up at all [like setting an anchor] the unit gets confused and doesn't know which way you're pointing. Stays that way until you actually move forward then straightens out. Otherwise a great unit.
Very cute and tekky, but their maps are not very functional
steve in arkansas, Amazon
1 November 2012
Summary: I fish the marshes of south Louisiana. I purchased their map chip for this area for detailed maps because the navigating the cuts and bayous is critical. What I discovered is that the map overlays for a given area are so DARK that they are virtually useless. Who in the world designed this feature? It is obvious that some tech dude, who's never been outdoors, developed these screens indoors with no outside light.
Garmin best unit , get the g 2 bluechart card its amazing
william fouts, Amazon
27 October 2012
Summary: you will need to buy the g 2 bluechart card if you want the best it is amazing, this is one of the best units out there and very easy to use, i have had my garmin for two years now and love it, it got me through the ten thousand island of south west coast of florida with no problem.you would never wanna be out there with out a great unit, you can get lost so fast because everything looks the same.