Some important things to remember about fish arches: It is better to use Narrow beam for a more precise evaluation of the fish size. Ⓘ When using Wide beam, fish arches/lines will look much thicker, compared to when you use a Narrow beam. Ⓘ When locating fish, use the Wide beam first to find the general location of fish, then switch to a Narrow beam and scan that area a few times to get the exact location and the size of fish. Narrow beams cover a smaller area, so it may be harder to locate the general presence of fish. Narrow beam (7°/15°/16°) is much more accurate when determining the size of the fish, so if you see a thick arc or line when using this beam - the fish is definitely big. Wide beam scanning is best suited for shallower waters. Wide beam (47°/55°) is good for quickly scanning larger areas and getting general information on fishes, depth and bottom structure, but the accuracy and detail will be lower. You will not be able to accurately determine the size of the fish using Wide beam, but due to a large area covered by the beam you'll be able to locate the presence of fishes faster (for example, if you're looking for schools of bait fish). Recommended sonar settings for locating fish when Fish icons are OFF:
#Deeper chirp plus how to
How to read a Deeper PRO/PRO+ sonar screen. How to read a Deeper CHIRP+ sonar screen. The thickness of those lines/arches is the indication of how big the fish is. If you'll turn Fish Icons off, you'll see that fish in sonar readings are displayed like arch or lines. Second option is to disable Fish icons and look at the real sonar readings, which is considered to be a more advanced method, but more accurate at the same time. But when you see a big fish icon - there is a very good chance that the fish is actually big.Īnalyzing raw sonar display (Recommended) It is impossible to say that Big fish icon means that the fish underneath is more than 20 or 35 cm long. Ⓘ Please note that it is impossible to determine the exact size of the fish using any kind of sonar technology - this is related to how all sonars work and ultra-sound physics. So, you should look at different size of fish icons as an approximate evaluation of the size of the fish, but not as exact measurement. Sensitivity: 70-90%, but can be reduced if the water is murky, or if you're targeting big fishes only. Narrow beam (7°/15°/16°) is much more accurate when determining the size of the fish. Wide beam (47°/55°) is good for quickly scanning larger areas and getting general information on fishes, depth and bottom structure, but the accuracy and detail will be lower. You will not be able to accurately determine the size of the fish using Wide beam, but due to a large area covered by the beam you'll be able to locate the presence of fish faster (for example, if you're looking for schools of bait fish). If you choose to use this option, here are the best-suited settings of your Deeper sonar: There will be 3 different sized fish icons according to the discovered fish sizes. When Fish Icons are enabled, special algorithms will analyze the sonar screen and mark ultrasound reflections from fish with fish icons. It's impossible to make it fully accurate and no sonar maker/brand has been able to achieve this, which is why no sonar maker recommends using fish icons. Fish icons are not fully accurate so you may see marked fish where there actually aren't any. Using Fish Icons method (Not Recommended)įish Icons option is considered to be the easiest way to locate fishes, and something that can be used if you don't have experience in reading the sonar screen.
#Deeper chirp plus pro
At the moment, there are 2 ways you can detect fish and determine their size using the Deeper Sonar PRO / PRO+ / CHIRP models: Fish Icons or Detailed sonar screen mode (Fish icons OFF).
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