Fish Finder for Bait Boat – Why 715 kHz Sees More Than 200 kHz?

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🎯 Why Most Fish Finders Don’t Show the True Bottom Image?

If you’ve ever seen “fish arches” on an echogram where you should only see the bottom and plants, this article is for you. The problem lies in the sonar’s operating frequency.

Most fish finders for bait boats operate in the range of 80-200 kHz. This means you get a general, overview image of the bottom – without details. Aquatic plants, branches, or details of the bottom structure can be incorrectly interpreted as fish.

EXTREME-MASTER SONAR S200 is a new generation fish finder that operates in the range of 200-715 kHz. That’s 5 times higher resolution than standard devices. You’ll see exactly what’s underwater – no guessing.

⚙️ How Does a Fish Finder Work? Sonar Technology Basics

A fish finder is a device that uses ultrasonic waves to scan the bottom. The process works as follows:

  1. Sending an ultrasonic pulse – The transducer emits a beam of sound waves at a specific frequency (e.g., 200 kHz, 455 kHz, 715 kHz).
  2. Traveling through water – The ultrasonic wave moves through water at a speed of about 1500 m/s.
  3. Reflection from obstacles – When the wave encounters an obstacle (bottom, fish, plant, branch), part of the energy bounces back to the transducer.
  4. Receiving the return signal – The transducer receives the reflected signal and measures the return time.
  5. Calculating depth – Based on the return time, the device calculates the distance: Distance = (Time × Speed of sound) / 2

📡 What is Sonar Frequency?

Frequency is the number of ultrasonic wave vibrations per second, measured in kilohertz (kHz):

  • 📉 Low frequency (50-200 kHz) – long wave, deep range, fewer details
  • 📈 High frequency (455-715 kHz) – short wave, shallower range, LOTS of details

✅ Summary – Why 715 kHz is Better

EXTREME-MASTER SONAR S200 with 715 kHz offers:

  • ✅ 5x higher resolution than standard fish finders
  • ✅ Clear distinction between fish and plants
  • ✅ Detailed bottom structure (stones, shells, branches)
  • ✅ Precise depth measurement with 10mm vertical resolution
  • ✅ Integration with EXTREME ONE App

Want to see more details? Visit our shop and discover the EXTREME-MASTER SONAR S200!

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