Well-chosen motorboat anchor Unlike heavy boats, small boats are highly exposed to wind and current, so the requirements for restraint are specific, and a mistake in calculating or choosing a design type can lead to the loss of a vessel or an expensive engine.
Many beginners make the classic mistake of relying on the mass of the object, forgetting about its shape and ability to interact with the ground. Motorboat It has a sailing speed and often anchors with its nose to the wind, putting a constant strain on the lock, and in this article we will discuss how to avoid demolition and properly equip the parking lot.
Calculation of the weight of the anchor for the boat
It is commonly believed that the weight of an anchor should be approximately 10% of the displacement of a vessel, but for light inflatable or aluminum boats, this formula often gives excessive values. A more accurate method is a calculation based on the length of the hull and operating conditions.
When choosing, focus on the following averaged data that will help to form a primary idea of the required mass:
- ⚓ For boats up to 3.5 meters in length - the weight is 3-4 kg.
- ⚓ For boats from 3.5 to 4.5 meters – weight of 4-6 kg.
- ⚓ For boats over 4.5 meters – weight from 6 kg and above.
- ⚓ In a strong current or wind, the mass must be increased.
It is important to bear in mind that retainer It depends not only on the weight, but also on the type of soil. On a sluggish bottom, even a light anchor can hold perfectly if it burrows properly, whereas on a rocky bed, a heavy object can simply slide across the surface. PVC boats They are particularly sensitive to overload, so the balance between weight and efficiency is important.
⚠️ Warning: Never tie the anchor phala directly to an inflatable balloon or a crumb pen without amplification. When a wave is thrust or a boat is sharply braking, the thin material may not withstand the load, which will lead to depressurization of the cylinder and loss of anchor along with the craft.
The ideal solution for calculating is to use specialized tables or online calculators that take into account the sailing area of your vessel. However, if you do not have such tools at hand, the rule of 1 kg per 1 meter of length works as the minimum threshold for calm weather.
Types of anchors for small craft
The market offers many designs, but not all are suitable for motorboats, the main requirement is compact storage and the ability to quickly burrow into the ground. Heavy admiralty-type sea anchors are almost not used here due to the complexity of their placement in the cockpit.
The most popular and effective models for small fleet are:
- 🦀 Cat anchor - classics of the genre, folding paws allow you to compactly remove the device into the funduk.
- 🦀 Grapple. An improved version of the cat with more curved legs, providing better grip.
- 🦀 Plow It works well on sand and silt, but requires more storage space.
- 🦀 denforth It has a high retention force, but can get stuck in stones.
Choosing between folding And as a whole, think about the dimensions of your boat. For PVC boats less than 3 meters long, folding is often the only sensible way to keep usable space in the cockpit.
And it's worth noting that there's no one-size-fits-all solution. If you fish primarily on rocky rivers, cat anchor In such cases, experienced boaters recommend having a spare version or using an anchor chalk.
Anchor False: Material and Length Selection
The choice of cable for the anchor system must be taken as seriously as the choice of the cargo itself. Traditionally, two types of materials are used: synthetic cable (nylon, polypropylene) and metal chain, each with its advantages and disadvantages in operation.
Synthetic anchor It's light, it doesn't rust, it's nice to touch, which is important when you pick anchors with your hands, but it does rub against rocks and it sinks badly, forming loops that can wind into the engine screw, and the chain adds weight to the system and provides horizontal force to the paws, but it's heavy and can damage the side of the boat.
The optimal solution for a motorboat is often a combination of a short chain (1-2 meters) at the anchor and a basic synthetic cable, which allows the paws to lie better on the ground and protects the cable from rubbing.
How do you calculate the length of the file?
The length of the anchor cable should be 3-5 times greater than the depth in the parking lot. For example, at a depth of 3 meters, the minimum length of the cable will be 9-15 meters. The reserve is necessary to ensure that the angle of thrust is gentle, otherwise the anchor will be pulled from the ground when rocking the boat.
Don't skimp on the diameter of the cable. A thin rope can cut hands when sampling, especially if the boat blows away with the wind. The optimal diameter of a nylon cord for light boats is 6-8 mm.
Installation of the anchor system on PVC and aluminum
The proper installation of the anchor device is a matter of safety. In inflatable boats, it is strictly forbidden to attach the anchor to the transom or cylinders without special reinforced elements. The main attachment point should be a bow bolt reinforced with large diameter washers on the inside of the board.
For aluminum boats (kazak, salad), the situation is simpler: you can use regular ducks or welded brackets, but there is a nuance here: when you anchor from the nose, the boat stands up against the wind, which can be uncomfortable when fishing from the stern.
Let’s look at the basic elements of proper installation:
- 🔩 The presence of a rope breaker to protect the side from grinding.
- 🔩 Use of quick-removal carbines for prompt uncoupling.
- 🔩 Organization of an anchor box or bag for storing wet cable.
- 🔩 Installation of the rim bolt strictly along the axis of the diametric plane.
⚠️ Attention: When anchoring from the stern (sometimes done on rivers with strong currents), there is a risk of flooding the wave into the cockpit if the boat goes lag to the wave.
If you change fishing spots often, it makes sense to make a removable anchor system, which will allow you to quickly dismantle the equipment and make room in the boat for other tasks.
specifications comparison table
To organize the information and help you make your final choice, we compare the main types of anchors that are applicable to motorboats. The data are averaged and can vary depending on the manufacturer.
| Type of anchor | Weight (kg) | Type of soil | Compactness |
|---|---|---|---|
| Cat folding. | 2 - 6 | Sand, silt, grass. | High. |
| Grapple. | 3 - 8 | Rocks, shells. | Medium |
| Plow | 4 - 10 | Sand, clay | Low. |
| denforth | 3 - 7 | Sand, silt | Medium |
As you can see from the table, folding-cat It is also a great powerhouse for versatility and ease of storage, making it a leader among PVC boat owners, but for serious water outlets, more specialized models are worth considering.
For PVC boats up to 3.5 meters long, the best choice is a folding cat anchor weighing 4-5 kg in combination with a nylon phala 6-8 mm in diameter.
Armor setting and sampling techniques
The anchoring process requires honed skills, especially in windy weather, and the rule of thumb is never to drop anchor while standing still, especially from the stern, which can lead to entanglement of the cable around the engine propeller, which is a common cause of accidents.
The correct sequence of actions looks like this:
- Approach the point of parking against the wind or current.
- Stop the boat and let it start drifting back.
- Smoothly etch the fal, allowing the anchor to touch the bottom.
- Continue to move in reverse or under the influence of the wind, putting the cable.
- When the required length is etched, fix the fold and let the anchor catch.
There are also secrets to sampling anchors: Don't pull the boat to the anchor with a full rev if you feel a dead hook, it's dangerous for the transom; it's better to pull up by squeezing the rope with your hands, or use the inertia of the boat to rock it.
☑️ Checking before getting on the water
If the anchor is sucked into the silt, try to change the angle of thrust by approaching it from different directions, often helping to stir the ground and free the paws.
Frequent errors and security measures
One of the most common mistakes is to use a too short phalanx, so the anchor does not lie on the bottom, but hangs in the water column or twitches, preventing the legs from catching. Corner of attack It should be minimal, almost parallel to the bottom.
Also, the condition of the cable is often ignored. Wet nylon, when dried in the sun, becomes stiff and brittle. Regularly check your anchor kit for scuffs and fibre ruptures.
⚠️ Warning: When using an anchor at night, be sure to display an anchor light (all-round white light) in accordance with the rules of the WFPSS so that other boats can notice your parking.
Don't forget that anchorage The thrusts from the wave can create forces several times the static weight of the anchor. Always have a margin of safety.
Grease the carvings of the folding legs of the anchor with graphite lubricant or litholic, which will prevent the mechanism from souring in salt water and allow the anchor to quickly decompose at the right moment.
Can a concrete anchor be used for a boat?
You can use homemade concrete anchors, but with caution. Concrete is fragile and can break when hitting rocks, losing weight. In addition, concrete anchors usually have no legs that hold only by mass, which reduces their effectiveness on soft soils. It is better to use concrete as a base, putting a metal hook or rebar in it.
Which unit is better to use to fasten the anchor?
The best way to attach the anchor ring to the fale is to have a Bowlin or a Fisherman's Knot, which is strong, non-slip, and relatively easy to untie after loading, and make sure to melt the ends of the synthetic cable so that they don't open.
What if the anchor is stuck dead?
If the anchor cannot be pulled out with a brute force of rope, try to create a jerk in the opposite direction (go to the anchor on the other side). In extreme cases, if the anchor is not of high value, it can be left by cutting the fal (leave the buoy). Never try to pull the anchor stuck with a powerful motor, risking damage to the transmissor or roll over.
Do you need an anchor ball?
For a motorboat, an anchor ball (as on large boats) is optional and rarely used, and it is used by any visible object raised on the phall if you want to signal a parking during the day, but by the rules, during the day it is enough that the boat is stationary relative to the water, the main thing is that at night you do not forget about the lantern.