Reliable parking on the water is not just comfort, but a matter of safety, especially for owners. flyboatUnlike rigid hulls, PVC boats have less inertia and greater sailing, making them vulnerable to wind or current. An improperly selected anchor can lead to the loss of expensive equipment or even create a dangerous situation for the crew.
Many beginners make the mistake of buying the first cargo they get or relying on intuition. But there is a clear correlation between the displacement of the vessel, operating conditions and the mass of the donut, and understanding these physical principles will allow you to avoid drifting in a storm or, conversely, the inability to lift the anchor from the depths.
In this article, we will discuss proven calculation methods, types of designs and the nuances of their use for small-sized PVC vessels. You will learn to take into account factors that are often overlooked, and choose the ideal option for your fishing or walks.
Criteria for selection of anchor device for PVC
The first thing you need to determine is the type of bottom in the waters where you plan to fish. cat anchor with long legs, but for a rocky bottom it is better to choose Admiralty The universal solution is often called the mushroom-type or anchor. anchorIt has excellent engagement, but can be difficult to lift from the overgrown bottom.
The second criterion is material. Inflatable sides, it's critical that they don't have sharp edges that can damage cylinders. Aluminum models are lighter than steel models, but steel models provide better traction through weight. Always make sure that the vertebrae and braces are smooth, barless.
The third factor is the way we store it. The inflatable boat has limited space, so the anchor has to be compact. cat anchor When disassembled, you take up the minimum amount of space in the bag, but remember that complex hinge mechanisms require regular lubrication and corrosion checks.
- 🎣 Soil type: silt, sand, stone or algae dictate the shape of the paws.
- 🛡️ Safety of the sides: the absence of sharp corners and rust is mandatory.
- 📦 Dimensions: The device should fit freely in a hazel or bag.
- ⚓ Mass: Must match the length and windiness of your vessel.
⚠️ Warning: Never tie the anchor end(s) directly to the rim on the bow of the boat without the breaking element. When hooked to a snag in a strong current, this can lead to the boat tipping over or the transom rupture.
The choice also includes the sailing of your boat: High inflatable tubes act like a sail, increasing the load on the anchor even in low winds. If you use an awning or sonar on the rack, the wind load increases, requiring a heavier load or anchor with better aerodynamics.
Calculation of the mass of the anchor by formula
There are several empirical formulas for calculating the required mass of the anchor, the most common one in the boating environment is the length of the vessel, which states that the mass of the anchor in kilograms must be at least 1/10 of the length of the boat in meters. PVC boats This is often not enough because of their lightness and high sailing.
A more accurate calculation is based on displacement, which is estimated to be about 10% of the weight of the anchor, for example, a boat with a displacement of 400 kg (including crew and equipment) would require an anchor weighing about 4 kg, but this is true for calm water; in strong currents, the mass should be increased.
If you choose between steel and concrete, remember that a concrete anchor of the same mass will have a larger volume and a lower density, which can reduce its efficiency over the course. sailor or Halla.Due to the density, it is better to “bite” into the ground.
If the calculated weight falls between standard values (for example, 3.2 kg), always round up. Extra kilogram at the bottom will give you confidence, but too heavy anchor will be difficult to lift manually, especially from a depth of more than 3 meters.
Table of correspondence of sizes and weights
To simplify the task of selection, you can use ready-made data, which are derived from long-term practice of operating small vessels. Below is a table that helps to navigate depending on the size of the boat.
| Boat length (m) | Recommended weight (kg) | Type of bottom | Recommended type |
|---|---|---|---|
| 3.0 | 1.5 - 2.5 | Il, grass. | Cat anchor, Mushroom |
| 3.0 - 3.5 | 3.0 - 4.0 | Sand, clay | Danforth, Plow. |
| 3.5 - 4.0 | 4.0 - 6.0 | Rock, shell. | Admiralty, Cat. |
| 4.0 - 4.5 | 6.0 - 8.0 | Mixed | Sailor (folding) |
| more than 4.5 | 8.0+ | Anyone. | Plow, anchor with cargo |
The data in the table is relevant for steel anchors. concrete For lead cargoes, their weight should be increased by 20-30% to achieve a similar holding force, since their shape is less aerodynamic. For boats longer than 4 meters, two smaller anchors are often used on the sides, which increases the reliability of the parking lot.
Use an anchor squeeze (short cable) of nylon 1-1.5 meters long between the anchor and the main cable. Nylon stretches and extinguishes the boat's jerks on the wave, preventing the anchor from being cut off from the ground.
It is important to understand that the table gives basic values. Real conditions on a body of water can dictate its rules. For example, on a river with a fast current (more than 1 m / s), the weight of the anchor for a boat of 3.5 meters is better to increase to 5-6 kg, regardless of the recommendations for calm water.
Effect of soil type on retention capacity
The retention power of an anchor depends on how deep and secure it is buried. At the sandy bottom, the anchors with wide paws work perfectly, acting like (ploughs) buried under their own weight. It's not so much the mass that matters as the geometry of the paws.
It's not the same on a rocky or pebble bottom, the anchor has to be clinging to the rock. Admiralty It's risky to use cat anchors on rocks, because they can get stuck between boulders, and you can't pull them out without losing gear.
In overgrown seaweed, the mass of the anchor plays a secondary role: the main task is to penetrate the vegetation layer and catch on to the hard ground. Heavy flat anchors lose here because they lie on the algae and slide. The best choice will be heavy conical or pear-shaped shapes that push the greens through.
- 🌊 Sand: wide paws are required for instillation.
- 🪨 Stone: You need a hooked horn to hook.
- 🌿 Algae: A sharp profile is needed to penetrate the layer.
- 🏺 Il: a large area of support is important so that the anchor does not completely go into the quagmire.
Fishers often encounter mixed soil, where the sand alternates with the shell, and in such cases, the universal solution is the anchor type. denforth It combines the ability to bury and cling to irregularities.
What if the anchor is stuck?
If the anchor is sucked into the silt or stuck between the rocks, don't pull ahead. Go to the staging point, pick a tether slack and tie the end to the transom dip. Slowly move along the strained cable, this will change the angle of thrust and often allows you to rescue the anchor without diving.
Proper organization of anchorage
Weight selection is only half of the success. The second half is the proper organization of the anchor system. The length of the anchor cable (cable) should be 3-5 times the depth in the parking lot, which provides a horizontal angle of thrust, allowing the anchor to burrow, rather than pull up.
Use a strong synthetic cable with a diameter of 6-8 mm. the chain between the anchor and the cable (long 0.5-1 meters) helps the anchor to occupy the working position faster and extinguishes the jerks. However, on inflatable boats with a chain, you need to be careful not to damage the cylinders when lifting.
☑️ Checking the anchor system
The anchoring has its own peculiarities: on PVC boats, the anchor is almost always mounted from the nose, but the thrust is transmitted through rump bolts reinforced with plates. Critically important do not attach the anchor end to the keys or handles for carrying - they may not withstand a jerk in strong winds.
⚠️ Warning: When anchoring from the bow of the boat, always make sure that the cable does not RUB against the side at a sharp angle. On the wave, this can quickly wipe the balloon, which will lead to an emergency.
Use an anchor assembly (such as a “fishing knot” or “boulin”) to attach the rope to the red, but be sure to provide for rapid discharge of cargo in an emergency. Some experienced boaters use a system with a burst insert of a line thickness of 0.3-0.4 mm, which will burst at critical load, keeping the boat intact.
Mistakes in selection and operation
One of the most common mistakes is to buy an anchor that is too light, just in case, because fishermen think that if there is no wind, then an anchor is not needed, or 1.5 kg will suffice. However, a sudden squall or a floating boat that created a wave can carry a light boat in minutes. The minimum permissible weight of anchor for PVC boats of any size should not be less than 1/15 of the length of the hull, but it is better to adhere to the 1/10 standard.
The second mistake is ignoring the condition of the cable. Cheap rope can rot, rub against rocks and break at the most inopportune moment. Always have a spare anchor flap. Also, keeping a wet anchor in a boat bag is a mistake, which leads to rapid corrosion of the metal and rotting of PVC tissue from contact with rust.
A third common mistake is to use sharp-angle anchors without protective linings. If you're not sloppy, such anchors can easily pierce a balloon. If you use homemade anchors made of pipes or concrete, make sure to round all the faces and cover them with epoxy resin or rubber.
The safety of the boat depends not only on the weight of the anchor, but also on the reliability of its attachment and the condition of the cable.
And also, seasonality, because in winter, when you're fishing on the current, you have higher anchor requirements, because the water is denser and the current can be stronger. In summer, in the heat, PVC becomes milder, and the risk of damage to the sharp parts of the anchor increases. Adapt your gear to the current conditions.
Frequently Asked Questions (FAQ)
Can I use a heavy stone or sandbag instead of an anchor?
You can use it, but you don't recommend it as a permanent solution. The stone has a smooth surface and a poor grip, it will slide down the bottom. The sandbag is good because it can be filled on the spot, but the fabric wears out quickly. Better buy an inexpensive factory cat anchor that will last for years.
How long should the anchor cable be for a boat 3.5 meters?
For depths up to 3 meters, the optimal length of the cable is 10-15 meters. This will allow you to anchor with a margin, given the need to etch the cable 3-4 times the depth for reliable holding. Always have a reserve of 5 meters in case of a cliff or loss.
Do I need an anchor if I'm fishing spinning in drift?
If you are fishing in drift, you do not need an anchor all the time, but it should be in the boat in case of an emergency stop (position) anchor-footIt's also necessary if the wind gets stronger and the drift becomes uncontrollable, or if you have to wait out the squall, and if you have an anchor, it's a safety requirement of the GIMS.
How to clean the anchor of mud and dirt after fishing?
The best way to wash the anchor with hose water is to get the dirt dry, if not dry, then dry it with a hard brush. You can't keep the dirty anchor in the boat bag, because the abrasive dirt will damage the bottom of the boat and the moisture will cause corrosion.
Which is better: one heavy anchor or two lights?
For large bodies of water and rivers with variable winds, it is better to have two medium-mass anchors, which allows you to stand "on the stretch" (one from the nose, one from the stern), which excludes the swing and rotation of the boat. For small lakes, one quality anchor of weight is enough.