CHIRP devices can transmit simultaneously on high and low frequencies. The lower frequency gives greater depth penetration, and it requires less power than a higher frequency signal so it generates less noise. The result is a “whisper into the water” that locates the fish without disturbing them. The higher frequency signal gives even finer detail at shallow to mid-water depths.
While catching a fish is often a case of matching wits—and great patience—a fisherman is at a distinct disadvantage without the right gear. eBay stocks the fishing supplies you need, like spinning rods, casting rods and more by St. Croix, Shimano and other top brands. There are plenty of saltwater and freshwater choices, so it doesn’t matter if you’re after salmon, trout or marlin.
These sonar reflections will also display on the screen. So this way a fishfinder reads and lets you view the bottom and everything it encounters in between. The angle of the sonar beam is measured in degrees and it’s called the cone angle. A wider angle covers more area underwater. Different fish detector models come with different cone angles. Some models also include multi-beam sonar technology that allows covering a much wider area.
When compared to other finders, this screen is relatively small, but it still gets the job done. Since it’s in full color and has high contrast, you can still see everything quite clearly. The only downside is that you have to switch between menus, which can be a problem if you are trying to find fish and mark your location. Overall, it’s not necessarily a deal breaker, but it may be enough to warrant a larger screen. Fortunately, the Striker can come in bigger sizes if you want to upgrade.
The image above, at right, clearly shows the bottom structure—plants, sediments and hard bottom are discernible on sonar plots of sufficiently high power and appropriate frequency. Slightly more than halfway up from the bottom to the left of the screen centre and about a third away from the left side, this image is also displaying a fish – a light spot just to the right of a 'glare' splash from the camera's flashbulb. The X-axis of the image represents time, oldest (and behind the soundhead) to the left, most recent bottom (and current location) on the right; thus the fish is now well behind the transducer, and the vessel is now passing over a dip in the ocean floor or has just left it behind. The resulting distortion depends on both the speed of the vessel and how often the image is updated by the echo sounder.
It changed the game once. Now it’s poised to do it again. The HELIX Series has evolved, now offering MEGA Imaging+, Dual Spectrum CHIRP and Bluetooth connectivity in select models, along with exclusive technologies like Humminbird Basemap that you won't get from any other fish finder in its class. Power. Bold styling. Ease of use. In this family, the apple doesn’t fall far from the tree.

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