If you want to find fish using a fish finder, you will need to use a transducer. The transducer sends out sound waves and picks up the echoes that bounce back from objects in the water. Fish finders interpret these echoes and show them on a screen as images that represent what is beneath your boat.
There are different types of transducers available, so it is important to choose one that is compatible with your fish finder. Most importantly, you need to decide what frequency or frequencies you want to use. Single-frequency transducers operate at just one frequency, while dual-frequency and multi-frequency transducers can operate at two or more frequencies.
The main advantage of using a higher frequency is that the sound waves penetrate deeper into the water column. This means that you can see larger fish that are swimming at greater depths. However, high-frequency sound waves also have a shorter wavelength, which makes it more difficult to get a clear image of smaller fish or objects that are close to the bottom.
Low-frequency sound waves have a longer wavelength and do not penetratethe water column as deeply as high-frequency waves. For this reason, low-frequencytransducers are better for seeing small fish near the bottom but cannot be usedto see deepwater fish effectively.
Some manufacturers offer special features like built-in temperature sensorsand speed sensors in their transducers. These features can be helpful ifyou want specific information about the conditions in the water around youor if you want to track how fast your boat is moving through the water.