Properly Using Fishfinders

Properly Using Fishfinders
If you're serious about fishing, then you need to learn about using a fishfinder properly. Fishfinders determine the depth of the water and identify fish and objects in the water by using sonar. A fishfinder clearly shows fish in the water as opposed to different items.


Difficulty: Moderately Easy

Step 1
Mount the fishfinder in the right spot on your boat, making sure to keep it away from any electrical items, which may cause interference. You should also be careful to firmly mount the fishfinder to prevent it from falling off the boat when you move across rough water.
Step 2
Change the sensitivity control to 100 percent, which causes the fishfinder to detect all objects, even small ones. If you set the sensitivity at a lower percentage, you may miss smaller fish or areas under the water where the fish hide. Also, turn off the gray-line feature, which can be distracting.
Step 3
Adjust the chart speed feature to match the maximum speed of your boat or the speed you usually drive on the water. The chart speed looks at the speed of the boat and uses that in determining the size of objects. You might find it helpful to set the chart speed at a lower speed than the boat to identify smaller items.
Step 4
Turn up the volume, and play with the suppressor to adjust it to a setting that you like. The suppressor blocks interferences from noises in the area but may lose the signal from the sonar. You'll also want to play with the noise level to ensure you hear the sound when it finds fish.
Step 5
Learn the signals on the screen by reading your instruction manual or playing with the fishfinder on the water. The best thing you can do is read the screen and discover the differences in the images. Fish on the screen typically move quickly on the screen, and objects, such as tree stumps and trash, stay stationary.

Tips & Warnings

Never place your fishfinder on an area of the boat prone to water. Even the slightest bit of water can damage the fishfinder and prevent it from working properly.

Article Written By Jennifer Eblin

Jennifer Eblin has been a full-time freelance writer since 2006. Her work has appeared on several websites, including Tool Box Tales and Zonder. Eblin received a master's degree in historic preservation from the Savannah College of Art and Design.

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