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The Humminbird Helix 9 GSM is the ideal fishfinder for anyone looking for an affordable device that can do both side-imaging and down-imaging. Helix 9 is a tablet-like device that was introduced in 2016. The Helix 9 does have a number of innovations.
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The speed wheel is another transducer accessory. This paddle wheel supplies water speed to the display unit. These paddle wheel units have been proven to be inaccurate and susceptible to failure. If possible, we would choose a transducer that does not offer this option.
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A GPS combo fishfinder combination has many benefits. First, it is great for navigation in unfamiliar fishing areas. These devices are excellent at letting you know whether your fishing area is in shallow or deep water. They also tell you if there's any brush, and how clear the water is. You can also set up waypoints or create maps to simplify the fishing process. These are the best GPS fishfinder combos.
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You should look for a combo chartplotter/fishfinder that meets your connectivity requirements. You don't have to worry about having the NMEA 2000 network backbone in your older boat if you are not planning on getting it rewired.
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All combo sounders can measure water temperature. This information can help you determine if youre riding in a channel within an otherwise open ocean. To find large pelagic species such as marlin, fishermen often use temperature variations to locate pockets of water.
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You will also see the speed wheel as an add-on to your transducer. This paddle wheel provides water speed to your display unit. We have found these paddle wheel units to be notoriously inexact and vulnerable to failure. This option would be removed from any transducer we could find.
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Real Time Sonar comes with a vertical flashlight that can be combined with the 2D Sonar display. Selective Fish ID+ transforms traditional fish arches in fish icons. It also shows anglers where their targets are located. SwitchFire will give you clearer images. To only see the water beneath your boat, activate the Bottom Lock function.