5 common types of interference for marine transducers

To ensure that you don't experience interference with your transducer, make sure you have it installed by a professional who knows what they're doing.

Your transducer may be one of the most important boat accessories that you own, but like any electronic piece of equipment, it is subject to interference from the other devices on your boat, as well as conditions in the water. No matter how strong the signal, at times you may find that the transducer just isn't delivering information correctly. If you're able to identify the type of interference you are dealing with, it may be easier to correct the problem.

According to Vexilar, a marine electronics manufacturer, there are five basic types of interference you'll be dealing with:

  • Acoustical: This occurs when the transducer was installed improperly so that the flow of water over its sensors is not even. 
  • Conducted: If you have a trolling motor attached to your boat, or your transducer itself is installed within the propeller hub of your trolling motor, your device may receive interference from the motor. You'll only have to deal with this issue if your trolling motor uses pulse width modulation (PWM) for speed control.
  • Electromagnetic Interference (EMI): Similar to conducted interference, this occurs when your trolling motor produces such powerful electromagnetic waves that they are absorbed by your transducer's wiring. 
  • Ignition: Just as it sounds, you can suffer from noise and interference caused by your ignition switch, which can distort not only your transducer signals but also those of your marine radio.
  • Sonar Cross-Talk: You may experience this problem if the signals from your transducer are intersecting with those of another one nearby that is transmitting at a similar frequency.

Marine electronic parts are becoming more powerful every day, which means that they're producing more interference. If you want to avoid these problems, the best way to do so is to make sure you're using high quality parts supplied by ePal, and that you have them installed by professionals who know what they're doing.

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