Sound sounder installation is not just about fixing the instrument on board, it's about balancing signal quality with safety. Many anglers prefer the lateral mounting of the sounder sensor because it minimizes screw interference and ensures stable contact with water even at high speeds. However, the wrong location can lead to cavitation, false depth readings, or even the loss of expensive equipment.
Unlike the transom variants, the side installation requires more thorough surface preparation and understanding of the hydrodynamics of the housing. Accuracy of echolocation It depends on how smooth and in the right flow of water is the transducer. In this article we will discuss all the technical nuances that will help you avoid typical errors and get the most out of your sonar.
Before you take up a drill or glue, you need to decide on the type of your boat, since the approaches to aluminum, fiberglass and PVC are radically different. Lowrance, Garmin and Humminbird They offer universal solutions, but their effectiveness depends solely on the quality of the installation, so let's look at how to choose the perfect point for installation.
Choosing the optimal location for installation
Finding a place to fit is a process that requires patience and, preferably, preliminary testing of the sensor on the go. The main task is to find an area with a laminar flow of water where there are no air bubbles and vortices, usually the side of the boat in the front third, but not too close to the nose to avoid hitting the oncoming wave.
It's critical to consider the position of the propeller, and if the sensor is in the aeration zone of the propeller, the sounder screen will turn into a chaotic set of colored dots. hydrodynamic trace The engine can stretch quite far away, so moving the sensor forward or down is often the only solution.
- 🌊 Avoid places where air bubbles or cavitation funnels form when moving.
- ⚓ Consider the position of the anchor and winch so that the cables do not touch the sensor when sampling.
- 🛡️ Make sure that the selected area is protected from accidental impacts with a paddle or a bulge.
When choosing the side of the side (left or right), be guided by which side you most often fish or where the least turbulence from the engine. For outboard boats, the right side is often more “clean” in terms of water flows, but this rule is not absolute and requires testing in practice.
Fixing methods: comparison of technologies
There are several basic ways to lock the sensor on board, and each has its advantages and disadvantages. The choice of method depends on the material of the boat hull and your skills with tools. The wrong method can lead to leaks or detachment of the sensor at speed.
The most common option is to use plastic or metal brackets that allow easy adjustment of the angle of inclination and depth of immersion of the emitter, but such structures create additional resistance and can be damaged when hitting an obstacle.
The Hidden Benefits of End-to-End Installation
Through-hull provides the best signal, because there is no air between the sensor and the water, but it requires drilling holes in the hull and using a special ice-free liquid, which is not suitable for all boat owners.
An alternative is to glue the sensor inside the hull (for fiberglass boats) or attach it to suction cups/magnets (for temporary use). Stiffness of fixation If you stick it in, it's the maximum, but you lose the ability to adjust quickly. Magnetic options are good for testing, but at high speed, they can't withstand the load.
| Method | Complexity | Reliability | Effect on signal |
|---|---|---|---|
| transom bracket | Low. | Medium | Possible interference |
| side bracket | Medium | High. | Good. |
| Through-cutting | High. | Very high. | Perfect. |
| Plugging in | High. | High. | Great. |
Aluminum boats often use special adapter plates that stick or stick to the side, which avoids drilling the main hull and allows you to remove the sensor at any time.
Instructions: installation on bracket
Side bracket mounting is the most versatile method, suitable for most types of boats, including PVC and metal. The process requires care, since a mistake in the marking can cost you an additional hole in the board.
When drilling holes, use metal or plastic drills, respectively, using centrifugal cores. Once the bracket is installed and the sensor is fixed, you need to adjust its angle. The sensor should be strictly horizontal when the boat is afloat and moving at operating speed.
☑️ Installation check
Pay special attention to wiring. The cable should be fixed so that it does not rub against the side or hit moving parts. Insulation of compounds It has to be made with a margin, using thermal shrinkage and moisture-retarding hambricks, and water and electricity are a dangerous combination, especially in salty environments.
⚠️ Warning: When drilling holes in a metal case, be sure to treat the edges of the hole with an anti-corrosion compound, even if you use a stainless bolt. Contact of heterogeneous metals in water causes rapid electrochemical corrosion.
After the physical setup, run a test run on water. Check the sounder readings at different speeds. If the picture starts to crumble or vertical stripes appear, try lowering the sensor slightly or changing its angle relative to the flow.
Protection against interference and cavitation
Cavitation is the sonar's main enemy, and it's the formation of bubbles of vapor and air in low-pressure areas that, when they collapse, create noise that silences the signal, and the lateral mount often saves the screw from cavitation, but can get into the zone of the boat's own turbulent footprint.
To minimize risks, the surface of the sensor and the adjacent side should be perfectly smooth. Any roughness, adhesive algae or shell can cause bubbles. Regular cleaning of the lower part of the body is a mandatory procedure for the owner of the sonar.
- 🧼 Use a soft sponge to clean the emitter, do not use abrasives.
- 🔧 Check the tightening of fasteners before each season - vibration weakens the connections.
- 🚫 Do not install the sensor immediately behind the stiffness ribs or the lids of the case.
Use a special silicone lubricant for the moving parts of the bracket so that they do not “stick” with salt and oxides, allowing you to easily change the angle of inclination in the field.
Sometimes the problem is electrical tips, if the sonar cable is placed next to the motor's power wires or navigation lights, the screen may appear chaotic stripes, and try to lay the sonar cable away from the electromagnetic radiation sources.
Nuances for different types of boats
PVC boat owners often face the problem of a soft side that walks on the wave. The rigid attachment of the sensor to the inflatable cylinder can be unreliable. It is better to use special transition pads of large diameter that distribute the load, or to attach the sensor to a removable rod fixed in the switch.
Aluminum kandaks and crows are characterized by high-speed body vibrations, and a sensor attached directly to the vibrating metal will transmit these vibrations to the image, in which case using damper pads or removing the sensor on a separate rod that does not directly contact the bottom helps.
For fiberglass (FRP) boats, it is strictly impossible to use conventional construction silicone for pasting - it contains acetic acid, which corrodes fiberglass and spoils the signal. Use only special aquarium or boat sealants.
⚠️ Note: On outboard boats, don't set the sensor too low. When pulling the boat onto a trailer or lifting the engine, the sensor can become the lowest point and get a critical impact on the ramp or bottom.
The specifics of the housing material allow you to extend the life of the equipment and avoid unpleasant situations on the water. Adapt the method of attachment to your operating conditions, without blindly copying other people's solutions.
Service and seasonal storage
The sonar is sensitive, and its durability depends on proper care. After every fishing, especially in salt water, the sensor and bracket must be washed with fresh water. The salt, when dried, forms crystals that can damage the radiator's coating or crack microcracks in the plastic.
In preparation for winter storage, it is recommended to dismantle the sensor if the design allows. The cable should be carefully folded, avoiding clamps and sharp inflections that can violate the integrity of the shielding braid. It is better to store the equipment in a dry room at room temperature.
- 🧊 Do not leave the sounder in the cold - the battery and screen can suffer from low temperatures.
- 🔌 Lubricate the connectors of contacts with a special spray-lubricant to protect against oxidation.
- 👀 Visually inspect the sensor case for chips and cracks before the start of the season.
Regular flushing with fresh water and protection from mechanical damage during transportation – the guarantee that the sonar will last you for many seasons without losing accuracy.
Compliance with simple rules of operation will allow you to enjoy a clear picture of the underwater world season after season. Remember that high-quality installation and careful attitude to technology pay off with stable work at the most critical time of fishing.
Can I attach the sounder sensor to the tape or tape?
Not recommended. Even the most powerful construction tape can't withstand prolonged exposure to water, ultraviolet light and dynamic loads at speed. Losing a sensor in water is not only a financial loss, but also a risk to the environment and other water users. Use only the brackets and sealants designed for this.
At what height from the bottom is it better to have a sensor?
The optimal depth of the sensor is 10-20 cm below the keel or bottom line, enough to avoid air capture when rolling or turbulent, but not so deep as to create unnecessary resistance or risk of impact. For fast boats, the sensor can be lowered slightly deeper.
Does the thickness of the boat affect the sounder?
Yes, it does, but only if you have a through-board (no drilling) or pasting. For conventional plastic and aluminum boats up to 10-12 mm thick, the impact is minimal if you use the right gel coat or lubricant. For thick-walled metal boats (>15 mm) or double-bottom boats, an external installation is the only working option.
What if the sounder shows "porridge" at speed?
This is a sign of cavitation. Try lowering the sensor down to get it out of the turbulence zone. Check if it's contaminated. If the problem persists, maybe you've picked an unfortunate spot on board, and you should move the sensor closer to the nose or on the other side.