This high-tech Humminbird Helix 9 Sonar GPS Fishfinder Combo makes it easy to find your best catch in less time. It boasts a brilliant 480V x 800H 9" color display with backlight that's easy on the eyes. The Humminbird GPS Fishfinder is designed with precision internal GPS chart plotting and a built-in Humminbird Contour XD map, making it the most efficient technology to locate your prey. This product is also made with Ethernet networking capabilities and dual micro-SD slots. The 360 Imaging allows you to see all around your boat, or see five preset views and isolate your sweep. The marine GPS Fishfinder features Down Imaging Sonar that gives you a fish-eye's view of what's happening below the boat with images that are created with high-frequency sound waves. With the DualBeam Plus Sonar technology, two beams combine to access a wide coverage area for greater detail.
GPS, or Global Positioning Systems, use satellites in the sky to pinpoint your exact location when out on the water. This feature allows you to mark productive spots (and come back to them time and time again), find your way back to shore in the case of an emergency and also map out co-ordinates for your home lake through the use of mapping software.
Most GPS fishfinders are combo units, meaning they have both a depth sounder as well as a chartplotter. A chartplotter will showcase your location, superimposed over a map. This allows you to know your exact location at all times. Entering waypoints is as easy as pushing a button with these units, and this priceless function will allow you to mark fish, structure, launch ramps, or anything else you desire. Once saved, that information can be selected at any time, and those spots can be revisited, or avoided, during future visits. (This is an awesome feature for returning to that honey hole of a mid-lake hump!)
For those that do big-water fishing or certainly tournament anglers, having GPS built into your fishfinder will open up a new world of fishing fun and increased catch rates.
As you can see, fishfinders are an important addition to your fishing arsenal. I can guarantee that they will increase your catch rates, and in the world of angling, that's what each and every one of us strives for when out on the water.
One of the top products among GPS fishfinder combos is the Garmin echoMAP 50s. On its 5 inch display that gives crystal clear images in both day and night you can view your navigation data and target fish.