Finding fish in a water body that is not familiar from the bottom turns from divination into an exact science if you have a reliable assistant. For an inflatable vessel owner, choosing electronic navigation equipment is a real challenge, because the operating conditions here are radically different from stationary boats. PVC boat sonar It should not only be informative, but also compact, light and resistant to moisture.
Unlike aluminum or fiberglass vessels, inflatable boards don't allow you to simply screw a transom sensor onto a rigid transom without the risk of damaging the material when hitting an obstacle. In addition, the constant assembly and disassembly of equipment requires the mobility of the entire system. You have to find a balance between the power of the emitter, battery life and the dimensions of the display.
In this article, we’ll break down all the nuances that will help you avoid spending your budget on unnecessary features, but also avoid being caught by a blind appliance. We’ll discuss the types of emitters, how to install them on the soft side and the screen selection criteria that are really important for comfortable fishing from an inflatable boat.
Specifics of operation on inflatable boardsThe main feature of using echolocation equipment on inflatable floaters is the absence of a rigid translance of a standard shape. Most classical sensors assume a rigid fixation that is impossible on a PVC material without a special adapter. Any vibration or impact on a snag when driving on the motor can lead to displacement of the sensor or, worse, damage to the balloon.
⚠️ Warning: Never attach a heavy sensor directly to the cylinder without a rigid spacer or platform, otherwise when moving on a wave it can push or punctur PVC material.
Another critical factor is mobility: the fisherman often has to move inside the cockpit, change positions or even completely disassemble the boat for transportation. Garmin Striker or Lowrance Hook In basic configurations, they can be cumbersome for this task. autonomy And the weight of the battery becomes as important as the depth of the scan.
And you also have to consider that at low speeds, which are typical of trolling or slow alloys, the fluid dynamics of the sensor changes. The inflatable side creates more noise and air bubbles that can shield the signal. So the choice of frequency of radiation here plays a crucial role as the resulting image.
Selection of sensor type and scan frequencyThe heart of any sonar is a transducer, or sensor, that generates and receives sound waves. For PVC boats, two main types are most relevant: traditional sonars that operate at one or two frequencies, and modern side and bottom scanning systems, such as: DownVision or Side ImagingThe first one gives a classic arc of fish, the second one gives a photographically accurate image of the bottom.
The frequency of the signal directly affects the detail and depth of penetration. Low frequencies (about 50 kHz) pass better through the water column and are suitable for greater depths, but give a less detailed picture. High frequencies (200 kHz and above) are ideal for shallow waters and allow you to distinguish between individual branches at the bottom or small fish, but their range is limited.
CHIRP Technology
CHIRP (Compressed High-Intensity Radar Pulse) technology allows the sensor to emit not one pulse at a fixed frequency, but a whole range of frequencies simultaneously. This greatly increases the resolution and allows you to clearly separate targets that are close to each other. For fishing from a PVC boat, this is especially useful, because it allows you to confidently identify fish even in dense thickets of grass.
Inflatable boats often have universal sensors that work in two-frequency modes, which allows you to switch between search and detailed exploration modes depending on fishing conditions. It is also important to pay attention to the angle of radiation: a wide cone is good for searching, a narrow one for accurately determining the structure of the bottom under the boat.
- 🐟 Traditional 2D sonar A classic for determining the depth and presence of fish in a cone.
- 📡 Down Imaging - detailed picture of the bottom directly under the boat, the structure is clearly visible.
- 🔄 Dual-frequency sensors A universal solution for changing fishing conditions.
Screen size and ease of reading informationThe size of the display is a trade-off between readability and space in the cockpit. For a PVC boat, screens smaller than 4 inches can be too small to see the details of the relief on the move, especially if the device is wearing a sun-protective visor. However, models with a diagonal of more than 7 inches can be excessively bulky and uncomfortable to be placed on your lap or a small shelf.
The brightness and contrast of the matrix are as important as the physical size. In the bright summer sun, cheap LCD screens can go completely blind, making fishing impossible. Colored IPS displays, found in mid- and high-end models, provide excellent visibility from any angle and in any lighting.
It's also worth thinking about screen resolution, and high resolution allows you to see thinner lines of separation between the water layers and the fish contours. Minimally comfortable resolution for detailed study of the structure of the bottom is considered to be 480x272 pixels and above. The lower values are only suitable for simple depth control.
Methods of attaching the sensor on a PVC boatMounting a sensor on an inflatable boat is a creative process that requires precision. There are several proven methods, each with its own advantages and disadvantages, depending on whether you plan to leave the boat assembled on a body of water or disassemble it.
⚠️ Attention: The use of superglues or aggressive solvents for fixing sites on PVC material is strictly prohibited - this will destroy the fabric structure and lead to depressurization of the balloon.
The most common option is to use suction cups, special suction cups of large diameter allow you to temporarily lock the sensor on a smooth section of the side, but on the wave or in sharp maneuvers, this design can come off. A more reliable but time-consuming method is to install a hard pad (five) by hot or cold pasting.
For those who don't want to glue anything on board, there are transom wheels with brackets for the sensor or special belts that cover the balloon. Also popular are floating sensors that simply strap to the board on a cord and float freely behind the boat without creating resistance.
- 🔘 Suction cups. - fast, removable, but there is a risk of losing the sensor on the wave.
- 🧩 Plugging in a nickel It is reliable and aesthetic, but it takes time and skills.
- 🎣 Floating sensor It is safe for boats, but can get confused in algae.
Autonomous power supply and energy efficiencyThe issue of power supply on an inflatable boat is acute, since there is practically no place for placing heavy starter batteries. Modern sonars consume different amounts of energy: monochrome models can work up to 20 hours from a small battery, while color multifunction complexes with GPS on and backlight at maximum will "eat" the charge in 3-4 hours.
The best solution for PVC boats is lithium batteries (LiFePO4), which are much lighter than lead-acid counterparts of the same capacity and are not afraid of deep discharge. The weight of a 2-3 kg battery for a boater is much more important than for a boat owner, where every kilogram is not as noticeable.
☑️ Checking the power supply system
Lithium batteries are better at handling cold, but they cannot be charged at subzero temperatures without a special controller. Battery capacity You should choose with a margin of 30-40% of the planned fishing time to avoid unpleasant surprises away from the shore.
specifications comparison tableTo make it easier to choose, let’s compare conditional sonar models that target different inflatable boat use cases, and these parameters will help to form an initial impression of the class of the device.
| Parameter | Budget segment | Middle class | Professional |
|---|---|---|---|
| Screen diagonal | 3.5 to 4.3 inches | 5 - 7 inches | 7 - 9 inches |
| Screen type | Monochrome LCD | Color TFT | IPS/Sunshine |
| Frequency | 200 kHz | 83/200 kHz + CHIRP | Multison/SideScan |
| GPS module | Optionally. | Built-in | Built-in + GLONASS |
| Weight of kit | 0.5 kg | 0.8. 1.2 kg | 1.5 kg and above |
As you can see from the table, the price increases dramatically, the functionality and image quality, but for a beginner who is just learning to fish from a PVC boat, it is often enough to have a middle-class model, and the overpayment for professional features such as 3D mapping or ultra-high frequencies may not be justified in the first stages.
Protection of equipment from moisture and impactWater and electronics are incompatible unless precautions are taken. Even if the sonar body is marked IPX7 (short-term immersion), regular splashes, rain and condensation can damage the connectors and buttons over time. For PVC boats, where the instrument is often lying open on their lap or shelf, the risk of water getting in is maximum.
It is recommended to purchase or make a protective cover from waterproof fabric with a transparent window for the screen immediately after purchase, which will protect the device not only from water, but also from mechanical damage during transportation in a bag with hooks and loaders.
Use dielectric lubrication to handle sensor and power connectors – this will prevent contact oxidation from salt water and moist air.
When storing the boat in a deflated state, be sure to remove the control unit and battery. Prolonged storage in a compressed state or at negative temperatures can lead to deformation of the hull or loss of battery capacity. Humminbird and Practik In their manuals, they emphasize the importance of dry storage.
FAQ: Frequently asked questions
Can I use a sonar in winter when the PVC boat is on ice?
You can't use a sonar through the ice layer because the air between the sensor and the ice (or between the ice and the water) reflects the signal completely, but if you make a hole and lower the sensor into the water, the device will work normally, even if the boat itself is standing on the ice next to it, the main thing is to ensure the battery is frost-resistant.
Will the sonar show the fish that is right under the sensor?
This is a common misconception: the area directly below the sensor (cone) is often a "dead zone" or a zone of minimal informativeness for lateral scanning. Fish passing directly under the boat can appear as a blurred spot or arc. The fish is best seen when it passes along the edge of the scanning cone.
Do you need GPS for fishing from a PVC boat?
The GPS module is highly desirable, it allows you to store the coordinates of the catch points ("wobler trails", pits, drifters) to return to them later, and tracking the path helps to analyze the route traveled and avoid retracing already checked areas, for navigation in fog or large reservoirs is a matter of security.
Why does the sonar show "porridge" instead of bottom?
So-called "porridge" on the screen usually occurs because of too high sensitivity (Gain) or the presence of a large amount of suspension in the water, and also the cause can be the engine, creating air bubbles that fall under the sensor. Try to reduce the sensitivity or change the position of the sensor.
Properly selected and installed sonar increases the efficiency of fishing from a PVC boat at times, turning chaotic search into a purposeful hunt for trophies.