Holder for sonar on the boat: selection, installation and operation

Quality fishing or professional navigation is impossible without a clear overview of the underwater environment, so the right way to do it is not a good idea. sounder It's becoming a critical element of the boat's equipment. Many boat owners make the mistake of underestimating the importance of securely fixing an expensive appliance, relying on temporary solutions like suction cups or holding hands, which often leads to the loss or failure of the gadget. A robust bracket ensures not only the safety of the device, but also the stability of the image on the screen, eliminating the jitter of the engine or the excitement.

The choice of a particular model depends on many factors: the type of boat, whether it is lightweight. PVC In this article, we will discuss in detail the design features of various mounts, the nuances of their installation on different types of board and transom, and give recommendations for the care of metal elements in an aggressive salt environment.

Criteria for choosing a reliable anchor for sonar

When choosing a fixing element, you first need to pay attention to the fabrication material and installation method, since they determine the durability of the entire structure. Cheap plastic models may not withstand the impact of a sharp start or hit an obstacle, while quality plastic models can not withstand the impact of the impact of a sharp start or hit an obstacle. aluminum or stainless steel It's important to consider the weight of the device and the sailing of the sensor, especially if you plan to travel at high speeds.

The second important aspect is the versatility and ability to quickly adjust the position of the screen. A good bracket should allow you to change the angle of the display to eliminate glare from the sun, which is especially important in clear weather. In addition, the mounting mechanism should provide rigid fixation, eliminating spontaneous twisting or displacement of the device while traveling along the wave.

Pay attention to compatibility with your particular sonar model, as the mounting standards from different manufacturers can vary significantly. Garmin or LowranceThey use proprietary mounts that require specific adapters, while others have universal bolt holes.

• 🔩 Material: Marine aluminum (AlMg) or AISI 316 stainless steel are preferred for corrosion protection.
• 📐 Adjustment: The presence of hinge connections with retainers allows you to quickly change the angle of view.
• 🌊 Moisture protection: The design should not accumulate water at the joints, causing oxidation of the contacts.
• ⚓ Compatibility: Check the match of the seats of the bracket and your sonar.

⚠️ Warning: Never use conventional self-tapping screws to mount the holder on board the boat, as they do not have the necessary anti-corrosion treatment and quickly rust, destroying the structure of the board.

Types of fastenings: transom, onboard and rotary

The most common solution for small boats is trannyThese are the fixed, screwable, and removable designs that are fixed with rods or propellers, and the fixed versions are more reliable, but require transom drilling, which is not always acceptable for expensive boat models or frequent transportation.

Airborne mounts, mounted on board or floorboard, are often used as an additional location for the second screen or for the placement of a side-view sensor. They can be made in the form of L-shaped consoles or retractable rods that allow equipment to be removed from the boat when passing under bridges or in narrows. Rotating mechanisms with a fixed angle of rotation allow the operator to quickly move the screen into the area of view of the skipper.

For professional use, complex systems with depreciationThese holders prevent the transmission of high-frequency vibrations to the display matrix and internal electronics, extending the life of the device. Some models include sleds for rapid removal and installation of the sonar with one hand.

Specifics of installation on PVC boats and boats

Mounting the holder on an inflatable boat requires a special approach, because classical drilling is not allowed here. For PVC boats, special inflatable holders or brackets are used that are attached to stringers and soldering deck. It is important to ensure that the attachment point falls on the rigid element of the structure, otherwise the soft side will deform under the weight of the device, violating the tightness of the seams.

In the case of metal or plastic boats, the installation process is different and often involves drilling holes. It is critical to choose the right drill and sealant to prevent water from entering the board or transparticle. silicone sealants or polyurethane compounds is a mandatory stage before the final tightening of fasteners.

When installed on a transom, the position of the motor's lower unit must be taken into account so that the bracket does not interfere with the operation of the motor or the rise/lowering of the lower unit. Often the holder is shifted away from the plane of rotation of the screw to avoid damage in the event of an impact on underwater obstacles.

Manufacture materials and corrosion protection

The aqueous environment, especially salty seawater, is an aggressive solvent for most metals, so the choice of holder material plays a key role. Aluminum alloys of the 5000 and 6000 series (e.g., AMG) have excellent corrosion resistance and lightness, making them ideal for light boats and PVC boats, but even aluminum requires protection in the form of anodizing or powder painting.

Stainless steel grades AISI 304 and AISI 316 are considered the standard for marine applications, but it is not without disadvantages. Cheap "food" stainless steel can be subject to spot corrosion in the welds or mechanical damage. Therefore, when buying a steel holder, you should pay attention to the quality of polishing and the absence of visible surface defects.

Plastic composites and reinforced polymers are also being used, especially in the low-end segment, which is completely inert to water, but inferior to metal in strength and resistance to ultraviolet radiation, becoming brittle over time. For long-term use, it is better to choose combination options where metal carries load, and plastic performs a decorative or protective function.

Materials	Resistance to corrosion	Strength	Weight.	Price.
Stainless steel AISI 316	High.	Very high.	Heavy.	High.
Marine aluminum	Medium/High	High.	Light.	Medium
Plastic/Composite	Absolute.	Low.	Very light.	Low.
Conventional steel (painted)	Low.	High.	Heavy.	Low.

Instructions for self-installation of the holder

The process of installing the holder yourself requires accuracy and adherence to technology so as not to damage the hull of the boat. First, you need to carefully clean the surface at the site of the intended installation, degrease it with solvent or alcohol to ensure maximum adhesion of the sealant, then try on the bracket and mark the holes with a marker or a corer.

The holes should be drilled with a drill of the appropriate diameter, strictly perpendicular to the surface, to avoid chipping and irregularities. For aluminum and plastic cases, it is recommended to use stepped drills that give a flat edge of the hole. After drilling, the edge should be cleaned and treated with anticort.

The final step involves applying the sealant to the fasteners and putting the holder in place. The bolts are tightened evenly, cross-to-cross to avoid skewing the structure. The excess sealant is removed immediately, before it dries, with a wet cloth.

Sequence of action:
Marking of the installation centre.
2. surface degreasing (acetone/alcohol).
Drilling of the hole (diameter under the bolt + 0.5 mm).
4. Applying sealant to the thread and base.
Installation of the gasket and fixation with bolts.
Removal of excess and time for polymerization (24 hours).

⚠️ Before drilling, make sure that there are no electrical wiring, fuel hoses or other hidden communications at the exit point of the drill on the back of the side.

Maintenance and typical operational problems

Even the highest quality holder requires regular maintenance, especially if the boat is operated in harsh conditions. Periodically you need to check the tightening of all threaded connections, since vibration has the property to unwind even reliably fixed nuts. growers or carving fixtures (e.g., Loctite) significantly reduces the risk of self-unwinding.

One of the common problems is the acidification of the moving parts of the hinges due to the ingress of sand and salt. To prevent this mechanism, you should regularly wash with fresh water and lubricate with silicone grease, which does not destroy rubber seals and plastic. If the holder began to luft, it may have worn out the fluoroplastic bushes that need to be replaced.

Visual inspection for cracks, especially in welds or metal curves, should become a habit after each season. Microcracks can quickly grow under load, leading to sudden breakage and the fall of expensive equipment overboard.

FAQ: Frequently asked questions

Can I use a car holder for sonar on a boat?

Use of car suction cups or clamps is strictly not recommended, since they are not designed for constant humidity, vibration and wind loads characteristic of the aquatic environment.

How often should I change the sealant under the holder?

It is recommended to check the condition of the sealant once a season. If you notice the appearance of gaps, a change in the color of the sealant or traces of moisture, it should be completely removed, clean the surface and apply a new layer.

Will the holder for the sonar for mounting the tablet or navigator?

Yes, many universal holders have a standard VESA mount or allow you to fasten the device to Velcro/clamps, the main thing is to make sure that the load capacity of the bracket matches the weight of your tablet.

How to lubricate the holder hinges so as not to damage the plastic?

The best use is silicone lubricants or Teflon sprays. Lithium lubricants (Litol-24) can aggressively affect some types of technical plastic, making them brittle over time.