Modern fishing has long since ceased to be a lottery, where the outcome depends solely on luck and intuition. Buying a sonar turns this process into a controlled activity, allowing you to see the bottom relief, the structure of the reservoir and the accumulation of fish in real time. PVC boat or a heavy boat, the presence of this device becomes not just a whim, but a necessity for successful fishing.
The market is oversupplied, and it's easy for a beginner to get confused about specifications like radiator power, scan frequency and screen resolution. It's important to understand that there's no one-size-fits-all device that's right for everyone. The choice depends on the type of vessel, operating conditions and, of course, the budget you're willing to allocate to the project. fishing-panel.
In this article, we will discuss the key aspects that will help you buy a really high-quality sonar, avoid common installation errors and adjust the device for maximum efficiency. The right equipment will save you time finding fish and allow you to enjoy the process, rather than guessing what is happening under the keel.
The principle of operation and the main specifications of echoers
Fundamentally, any sonar is echolocated, and it sends an ultrasonic signal into the water that bounces off the bottom, fish, or other objects and goes back to the sensor, and the signal travels in time to distance, forming a picture on the screen, but the devil is in the details, such as the frequency of the radiation.
Traditionally, sonars have operated at 83 kHz and 200 kHz. Low frequency (83 kHz) provides a wide viewing angle and deep penetration, which is ideal for greater depths. High frequency (200 kHz) gives a more detailed picture, but with a smaller viewing angle. DownScan or CHIRPThey allow you to combine these advantages.
The key is also the radiator power measured in watts (RMS). The higher the power, the better the device "punches" the water column at great depths and the cleaner the picture at high speeds of the boat. For shallow water and calm water, there are enough basic models, but for captured fishing on rivers with the current, you need serious equipment.
What is the difference between 2D and 3D sounders?
In 2D sonars, you see a flat slice of the pond directly under the boat, where the fish is displayed by arcs. 3D sonars build a three-dimensional map of the bottom, allowing you to distinguish between individual schools of fish and their exact location in space, which is critical when catching a predator on the terrain.
Types of echoers and choices for your boat
Before you place an order, you need to decide on the type of device, the market is divided into several categories, each of which has its own advantages. single-beam sonarThis is the most budget-friendly entry into the world of echolocation.
A more advanced option is two- and three-beam devices, which allow you to simultaneously scan a wide sector under the boat without letting the fish on the sides. PVCThey often drift or slowly move around the waters in search of parking lots.
Cartplotter sonars are a combination of navigation and echolocation, and if you're planning to walk in large bodies of water where it's important not only to find fish, but also to safely plot a course, buying a harvester is the most rational solution.
- 🎣 Classic sonars: Easy to control, have a monochrome or color screen, ideal for beginners.
- 🗺️ Carptlotters: Combines GPS-navigator and sonar, supports depth maps, suitable for difficult hikes.
- 📱 Smart sonar: Work in conjunction with a smartphone or tablet via Wi-Fi, convenient for temporary installation on inflatable boats.
Selection of sensor: transducer and its installation
The heart of any echolocation system is the transducer, which is the quality and choice of this element that determines 80% of success. The sensors are transom (mounted on the transom mirror), cut-in (mounted in the body) and thrown. For most anglers, the best option is a transmutation sensor.
When installing, it's important to follow strict rules. The sensor must be submerged even when the boat is moving in the plane, otherwise the picture will disappear. However, too deep immersion creates parasitic resistance and noise. The Golden mean - the bottom edge of the sensor is level with the bottom of the boat or 3-5 mm lower.
Pay special attention to the cable. It can not be bent at a sharp angle, cut or build up without special equipment, because it will break the wave resistance and lead to loss of signal.
☑️ Checklist before buying a sensor
⚠️ Attention: Never install the sensor in the aeration zone, where the boat is moving, air bubbles will screen the signal, and the screen will appear "dead zones" or noise interference, making fishing impossible.
Comparative table of popular series of echoers
To make the selection process easier, let’s compare a few popular categories of devices available in the market, which will help you navigate the price segments and functionality.
| Category | Example of model | Frequency | Power | Features |
|---|---|---|---|---|
| Budgetary | Garmin Striker 4 | 77/200 kHz | 250 W. | Built-in GPS, simplicity |
| Medium | Lowrance Hook2-5 | CHIRP | 500 watts | Auto-tuning, clear screen |
| Profi. | Humminbird Helix 7 | Mega Side Imaging | 2500 watts | Side scanning, detailing |
| Top. | Raymarine Element | RealVision 3D | 1,000 watts | 3D visualization, Wi-Fi |
As you can see from the table, the price difference is not just due to the brand, but also to signal processing technologies. Side Imaging (side scanning) allows you to see what is happening on the sides of the boat at a distance of up to 100 meters, which radically changes the tactics of search.
The size of the screen should also be considered when choosing a boat with a length of 4 meters is enough 4-5 inches. If you have a spacious boat, it is better to take a device with a diagonal of 7 inches to see a detailed picture from a distance from the steering wheel.
Installation and configuration of equipment on the boat
The installation process begins with the choice of a location for the head unit. The screen should be clearly visible to the steering wheel, but not glare in the sun. Modern IPS-matrixes have good viewing angles, but direct sunlight can still make it difficult to read data.
The sounder should be powered directly from the battery via the fuse. The use of standard "lighter" connectors is not recommended, as they often oxidize and give a voltage drawdown, which can lead to a sudden shutdown of the device.
Use a separate plug with a fuse to connect the sonar, located in an accessible place, which will quickly turn off the device if necessary, without climbing into the hold to the battery.
After physical installation, you need to adjust the device to a specific body of water. Basic settings include the choice of language, units of measurement and, most importantly, sensitivity. Automation often overstates sensitivity, showing a lot of "junk", so manual adjustment is necessary.
⚠️ Attention: When installing the transom sensor on boats with an outboard motor, make sure that in the elevated position of the motor, the sensor does not rest on the transom and does not damage. It is better to provide a recline mechanism or a detachable bracket.
Data Interpretation: How to distinguish fish from stones
When you buy a sonar, you get a problem: there are a lot of arcs and spots on the screen, but what's a fish? The classic arc on the sonar screen appears when the fish passes through the cone of radiation. First, the signal is weak, then it is amplified in the center of the cone and weakens again.
Rocks and driftwoods are mapped differently. Solid soil gives a clear, greasy bottom line. Soft silt blurs that line. Fish at the bottom can merge with the contour, but with increased sensitivity or function. Zoom It can be isolated.
It's important to learn to distinguish between noise and motor or electromagnetic interference, usually chaotic vertical bands, and the right wires and ferrite rings help minimize interference.
- 🐟 Dougie: A classic sign of an active fish swimming through a beam.
- 🪨 Solid bottom: Double line (echo from the bottom and echo from the bottom echo) is characteristic of stone or dense clay.
- 🌫️ Thermoclin: A horizontal jamming band at a specific depth where fish often stand.
The main skill of a fisherman with a sonar is not blindly following the readings, but the ability to compare the picture on the screen with the terrain and the behavior of the fish in current weather conditions.
Frequently Asked Questions (FAQ)
Can we use sea echo sounders on freshwater bodies?
Sea sonars are often more powerful and protected from salt water, which is superfluous in fresh water, but not harmful. The only caveat is that sensitivity settings may need correction, because salt water conducts sound better.
Why does the sonar show a fish but the hook is empty?
This can happen for several reasons: the fish is outside the scanning cone (side), you have miscalculated the size of the bait, or the screen is not showing fish, but gas bubbles/thermoclene.
Do I need to oil the transom sensor before the season?
No, modern plastic sensors don't require oil lubrication, and some oils can erode the plastic of the emitter, and if you want to improve slipping or protect against fouling, use water-based formulations that are approved by the manufacturer.
Which echoer is better for winter fishing from a boat?
In winter, the frost resistance of the screen and the battery is critical. LCD screens in severe frost can stick or react slowly, it is better to choose models that indicate operating temperatures up to -20 ° C and below, and use lithium batteries.
Does the speed of the boat affect the sonar readings?
Yes, it does. At high speeds (planing), the sensor can pop up or capture air, which causes a loss of signal. Also, at high speed, the sonar may not be able to update the image if the scanning frequency is low.