Choosing a sonar is always a balance between the desired functionality and the actual budget of the angler. The modern market is saturated with models from budget Chinese brands to top-end premium systems, which often puts the beginner at a dead end. Main objective So any sonar is to convert the sound waves reflected from the bottom and objects into a graphic image that you can understand on the screen, and it's the quality of that image and the rate of renewal that determines whether you see a cautious pike or miss it.
For owners of inflatable boats, the weight and dimensions of the device are critically important, since every extra kilogram has to be carried to water.
Owners of metal boats or fiberglass boats can afford more powerful stationary complexes with larger displays.
In this article, we will discuss the key parameters that will help you make an informed decision and not overpay for unnecessary functions.
Key specifications: power and frequency
The first thing to consider when choosing is work-frequency Most modern sonars operate at two main frequencies: 83 kHz and 200 kHz. The low frequency (83 kHz) provides a wide viewing angle of the cone, which allows you to scan a large area under the boat, but the detail here will be lower.
High frequency (200 kHz) gives a narrower beam, but the picture is much clearer, allowing you to distinguish even small details of the bottom relief and the structure of the fish. For deep-sea fishing or searching for fish in the thickets of grass, it is better to use high frequency.
⚠️ Attention: Don’t chase for maximum power if you plan to fish exclusively in shallow rivers or lakes. Excess power at depths of 3-5 meters can create a “noisy” picture and interfere with normal search.
If you often fish in different water bodies, choose a sonar with the ability to manually or automatically change frequencies (Dual Frequency) for flexible adjustment to the conditions.
The second important parameter is radiationFor outboard PVC boats, the optimal range would be 200-500 W RMS. This is enough for confident penetration of depths up to 30-40 meters. More powerful models (1000 W and above) are relevant for large boats and deep seas, where the signal must overcome the thickness of salt water and waves.
Types of sensors and scanning technologies
Modern sonars offer not only classic 2D scanning, but also advanced technologies such as DownVision, SideScan and CHIRP. CHIRP (Compressed pulsed radar echo) allows you to send a continuous signal over a wide range of frequencies, which greatly improves the clarity of target separation, and the fish on the screen does not look like a blurred spot, but like a clear arc.
SideScan and DownScan scanners are camera-based, taking pictures of the bottom under and on the sides of the boat, and are an invaluable tool for finding eyebrows, sunken trees and fish flocks in large waters.
- 🐟 Classic sonar - shows the arcs of the fish and the structure of the bottom in the form of a column under the sensor.
- 📸 downscanner - gives a photographically clear image of the bottom right under the boat, stones and driftwoods are perfectly visible.
- 🌊 sidescanner Scanning the area on the sides of the boat at a distance of 100-200 meters, allowing you to quickly find promising places.
What is the difference between 2D and 3D sounders?
3D sonars build a three-dimensional model of the bottom, combining data from multiple beams, which allows you to see the relief in three dimensions, which is especially useful for trolling at great depths, but such devices are much more expensive and require more complex tuning.
When choosing a sensor, it is also important to consider the material of the hull. transducerThey're easily removed and hidden, which is important when transporting a boat in the trunk of a car.
Echoer for PVC boat: the specifics of the choice
Inflatable boat owners face unique limitations: no hard transom, the need for rapid assembly and disassembly, and limited space. The ideal sonar for a PVC boat should be compact, lightweight and self-powered.
Often the best solution is portable models with built-in battery or the ability to work from the Power BankSuch devices can be mounted on board with a special bracket-crusher or even used in the "floating buoy" mode, if the design allows.
⚠️ Attention: When installing the sensor on an inflatable boat, make sure that the cable does not rub against the balloons of the inflated side. Constant friction can damage the insulation of the cable, which will lead to water entering and the sensor will fail.
For inflatable vessels are also relevant drop-offThey connect to a smartphone or tablet over Wi-Fi or Bluetooth, and that eliminates the need to pull wires across the boat, but it has its downsides: signal delay and battery dependency on the phone.
If you're using an electric motor, a sensor integrated into its leg is a great solution, and this keeps the transom free and ensures that the emitter is perfectly positioned in water.
Stationary complexes for boats and boats with rigid hull
Metal and fiberglass boat owners can afford to install full-fledged navigation systems, where the sonar is often combined with a mapplotter, allowing them to mark and return to catch points on a map.
An important aspect is the choice of the type of mounting of the display. For open boats, where the device can be exposed to splashes and sun, it is preferable. bracket (bracket mount), which allows you to quickly remove the screen at the end of the fishing and remove it in the cabin.
☑️ Check before purchasing a stationary sonar
For large boats, the screen size is critical. The minimum comfortable size is 5-7 inches, but for comfortable use of maps and scanners, it is better to choose models from 9 inches and above. brightness And anti-reflective coating.
Comparison of popular brands and models
The market is dominated by several key players: Garmin, Lowrance, Humminbird and more budget options from JJ-Connect or Practic.... Each brand has its own strengths and unique technologies.
Garmin is famous for its navigation capabilities and ecosystem, Lowrance offers a great balance of price and image quality, and Humminbird is traditionally strong in scanning technology. Budget Chinese brands often win on price but can be inferior in reliability and software quality.
| Brand | Price segment | Key technology | Who is suitable |
| :--- | :--- | :--- | :--- |
| Garmin | Medium/High | Panoptix LiveScope | Tech and navigation enthusiasts |
| Lowrance | Medium/High | StructureScan 3D | Universal choice for pros |
| Humminbird | Medium/High | Mega Side Imaging | Lovers of trolling and bottom fishing |
| JJ-Connect | Budget | Basic CHIRP | Beginners and winter fishing enthusiasts |
| Practic | Budget | Ease of use | Budget Fishermen |
Brand selection often depends on what devices your friends or club already have, as sharing wayspoints and cards between different systems can be difficult.
Installation and configuration: important nuances
The right sensor installation is 90 percent of the success in getting a good picture, and the sensor should be lowered horizontally relative to the surface of the water, and if the boat is going with a differentiator on the bow or stern, the sensor should be adjusted so that its bottom face is parallel to the water when moving.
You can't put the sensor cable in the string, but always leave a little loop at the entrance to the hull of the boat or the transom, which compensates for the vibration and jerking during the course.
Recommended setup sequence:1. Reset the sounder settings to factory (Factory Reset).
2. Start the engine and exit to clean water.
3. Enable Automatic Configuration (Auto) mode.
4 After initial adjustment, manually adjust the sensitivity so that the noise disappears, but the weak signals from the fish remain.
And remember to calibrate the speed of sound if you're going from fresh water to salt water or vice versa. The density of water affects the speed of the signal, and without depth correction, the images can be misrepresented.
Frequently Asked Questions (FAQ)
Can a sea sonar be used on a freshwater river?
Yes, you can. Most modern sonars are versatile. However, marine models often have very high power, which in shallow water can create excessive noise. You have to manually reduce sensitivity.
Why does the sonar show "porridge" instead of the bottom?
This can be due to several reasons: too high sensitivity, improper installation of the sensor (air bubbles), or working at maximum speed when the sensor does not have time to update the data.
Do you need GPS for fishing?
For serious fishing, yes, for sure. GPS allows you to go back to proven points, track fish tracks, and use depth maps. Without navigation, you lose the ability to organize your discoveries.
How do you clean the sounder sensor?
Use soft cloth and water. Do not use aggressive chemical solvents or abrasive sponges, as you can damage the plastic housing of the emitter, which will lead to water entering the interior.