Modern inflatable fishing is very different from land fishing or a fixed dock, and mobility allows you to explore new waters, but without technical control of the underwater space, it loses the lion's share of its effectiveness. PVC boat-hounder It becomes the digital eye that allows you to see what is hidden under ice or water.
Choosing the right device is not just about buying a gadget, it's about investing in the efficiency of the drive. Inflatable boards create specific operating conditions: vibration, puncture, limited power supply and special attachment requirements. Unlike rigid boats, every gram of weight and every watt of battery charge is critical.
In this article, we will discuss the technical nuances that beginners often miss: you will learn how to properly mount the sensor so that it does not interfere with rowing, and what scanning frequency to choose for specific fishing conditions.
Criteria for choosing a sonar for an inflatable boat
The first thing to look at when buying is the autonomy of the boats, and PVC boats are rarely equipped with powerful battery systems, so it's not easy to get a lot of battery life. power consumption Monochrome screens consume significantly less charge than high-resolution color displays, allowing you to fish full weekends without recharging.
The resolution of the screen directly affects the readability of the picture in sunny weather. Small screens with low resolution can go blind in the bright sun, making fishing uncomfortable. However, it is not necessary to chase the maximum size of the display either: a large device is more difficult to fix on the transom or sides of an inflatable boat.
⚠️ Warning: Do not buy sonars with open charging ports if you plan to actively catch in the rain. Water trapped in the connector will instantly disable electronics, and repairs are often unprofitable.
The most important parameter is the frequency of radiation. For fishing from a PVC boat, the optimal two-frequency mode is considered to be: Low frequency penetrates the water column deeper, covering a large area, while high frequency gives a detailed picture of the structure of the bottom and individual fish near.
Features of installation of the sensor on the inflatable board
Installing a transducer on a PVC boat is a creative process that requires a balance between signal quality and tank safety. Unlike fiberglass boats, you can't just drill a hole or stick a sensor dead, and most anglers use removable brackets or suction cups that are fixed to the side or trench.
The main problem with the installation is bubbles, and when the boat moves, the water flows around the side and the trawler, creating vortices and foam, and if the sensor enters the bubble-filled water zone, it will be very difficult to get the water. signal It's going to be lost, and it's going to be white noise, so it's a must-have.
For temporary attachment, special suction cups with a lever mechanism or magnetic holders are excellent (if metal weight is used for weighting). It is important to ensure the rigidity of the fixation: the squirm of the sensor on the wave will turn a useful picture into a porridge of spots.
☑️ Verification of sensor installation
The cable track also requires attention, the wire should not rub against the side or have tension that can pull the sensor out of the water when the boat jerks, it is recommended to use soft hambricks or tape to protect the wire in the areas of contact with equipment.
Comparison of popular echo sounder models
The market offers a variety of solutions, from budget "Chinese" to professional American brands. PVC boats don't always need a top-end mapping complex. Often a simple sonar with good detail is enough. Below is a comparison of the specifications typical of different price segments.
| Parameter | Budget segment | Middle class | Premium class |
|---|---|---|---|
| Scanning frequency | 200 kHz | 83/200 kHz | CHIRP (multi-frequency) |
| Radiation power | 200 watts | 250-500 watts | 600 watts |
| Screen resolution | 240x320 pixels | 480x480 pixels | 800x480 and higher |
| IP protection | IPX7 | IPX7 | IPX7 / IPX8 |
Budget models often suffer from the inertia of updating the picture. With fast boat wiring, fish may simply “not have time” to appear on the screen. Middle-class models lack this drawback and have more sensitive receivers.
Premium devices with technology CHIRP They can even distinguish small fish against bottom vegetation, which is critical for passive predators, but they can cost more than the boat itself.
The Secret of Budget Models
Cheap sonars often have software interpolation, they draw a beautiful bottom that doesn't exist based on previous measurements, trust only the sharp divergences of depth.
Configuring and interpreting sonar data
The right setup is more important than the price, and many anglers leave the factory settings, relying on automatic mode. automation Often mistaken, taking thermoclines or overgrown grasses for fish, or vice versa, ignoring small prey.
The first thing you need to do is adjust the sensitivity, which is to be leveled when there's a slight noise on the screen, and then you lower the value a little bit, and that allows you to get the most detail without any unnecessary visual debris.
The second important thing is the scrolling speed, which is that if you're drifting slowly, you have to keep the speed low so that the image doesn't shrink, and if you're actively searching on the motor, you increase the speed to see the real picture of what's going on under the keel in real time.
⚠️ Warning: Don't blindly rely on digital depths in the trunk. The sonar shows the distance to the first solid object, but it can miss a branch hanging in the flounders that will become a hook.
The fish and bottom relief are learned with experience. The fish on the screen usually looks like an arc (if it swims through a cone of radiation) or as a separate spot. The stones give a hard, clear shadow, and the soft, muddy bottom blurs the signal, making the bottom line thick and fuzzy.
Use zoom to investigate bottom anomalies, and zooming in 2-4 times allows you to see the structure of the bottom and the presence of small fish that the predator can attack.
Field power and nutrition
The power of the PVC boat sonar is particularly acute. Standard 12-volt batteries are heavy and take up space. Day fishing often requires specialized 2-4 Ah lithium storage devices that weigh less than 300 grams.
When using lead-acid batteries (for example, from a motorcycle or UPS), it is important to monitor the level of charge. Deep discharge is harmful to such batteries.LiFePO4) batteries are free of this disadvantage and can discharge almost completely without loss of life.
For multi-day expeditions, it is advisable to have a spare power bank with a 12V output or a solar panel for recharging in daylight hours. The consumption of modern sonars in economical mode is only 150-200 mA, which allows you to work from compact sources for weeks.
Don't forget to protect your contacts. Salt water and humid air quickly oxidize open terminals. Use spray protection for contacts or sealed tulip connectors with rubber seals.
The optimal solution for the PVC boat is a compact lithium battery LiFePO4 with a capacity of 4-6 Ah. It is light, is not afraid of full discharge and ensures the sonar for 2-3 days of active fishing.
Maintenance and storage of equipment
After each fishing trip, especially in salt water, the sonar and sensor must be washed with fresh water. The salt is cryalized and can damage the sealing rings or clog the sensor's acoustic windows, reducing efficiency.
The cable should be wound with rings with a diameter of at least 15-20 cm. Too tight a bend of the wire at the base of the sensor will eventually lead to a fracture of the veins and loss of signal. Visually, the cable may look whole, but inside the conductor will already be destroyed.
It is better to store the device in a dry room, removing the batteries if they are removable. The screens of older models can burn out or degrade when stored in direct sun in the closed awning of the boat in the summer. The temperature inside the awning can reach 60-70 degrees, which is critical for electronics.
How to extend the life of a sonar battery?
Don't keep the battery completely discharged. If the season is over, charge the battery to 60-70% and leave it in a cool place. Check the charge level every 2-3 months and recharge if necessary.
Why does the sounder show the wrong depth?
The reasons may be incorrect setting of sound speed (for salt and fresh water it is different), contamination of the sensor or the presence of strong interference from the working motor or sonar of neighbors.
Can I use a sonar in winter?
Yes, but you have to consider that LCD screens in the cold can stick and slowly renew. Lithium batteries also lose capacity in the cold, so it's best to keep them warm until they're used.