Controlling an inflatable boat without reliable fixation on the water turns into a chaotic wandering, especially in the presence of wind or current. Anchor for PVC boat It is not just an accessory, but a critical safety feature that allows you to lock a vessel for fishing, rest or emergency stop the engine. Incorrect choice of this device can lead to the loss of expensive equipment or even to an emergency on the water.
Many beginners make the mistake of relying on intuition or buying the first cargo they get without thinking about the physics of the process. Inflatable boards They create a high sailing speed, which requires significantly more retention force than metal or wooden counterparts, and in this article we will examine all the nuances from the mathematical calculation of the mass to the choice of the optimal design of the legs.
It is important to understand that there is no universal solution, as the conditions of navigation vary greatly. anchorageWe will take a detailed look at why a classic sea anchor can be dangerous to PVC, and what modern alternatives each boating should consider.
Containment physics: calculating the weight of the anchor
The main purpose of an anchor is not to lie on the bottom, but to burrow into the ground with its paws, using the force of friction and soil resistance. For inflatable boats, there is a proven empirical formula linking the mass of the anchor to the displacement of the vessel. It is believed that the weight of the anchor should be approximately 10% of the total weight of the boat with crew and equipment. PVC boats With their high sailing, this ratio is often increased.
If you're planning to fish in the current or in windy weather, standard calculations may not be enough, and in such cases, you need to consider the area of the boat's projection to the wind, and a light anchor simply can't overcome the force of demolition, and the boat will start dragging along the bottom, which is called "eating," which is not only uncomfortable, but also dangerous if there are fishing gear at the bottom or if the vessel is carrying to dangerous objects.
⚠️ Attention: Never use an anchor that exceeds the maximum permissible load on a transom or nasal duck. A sharp jerk in high winds can damage the mountings of an inflated balloon or turn over a light boat.
For more precise measurements, the table of the size of the boat and the mass of the anchor can be used, given for moderate wind and current conditions; for storm conditions, the values should be increased by 20-30%.
| Boat length (m) | Typical displacement (kg) | Min. anchor weight (kg) | Recommended weight (kg) |
|---|---|---|---|
| 2.4 – 2.8 | 150 – 250 | 1.5 | 2.0 – 2.5 |
| 2.9 – 3.2 | 300 – 400 | 2.5 | 3.0 – 3.5 |
| 3.3 – 3.6 | 450 – 600 | 3.5 | 4.0 – 5.0 |
| 3.7 – 4.2 | 650 – 900 | 5.0 | 6.0 – 7.0 |
| 4.3. and more | 900+ | 7.0 | 8.0 – 10.0 |
But mass is not the only thing. The design of the paws is crucial to how fast the anchor will hook. A heavy pancake without paws will only work on a rocky bottom due to friction, but on the silt it is useless. So when choosing between two models of equal weight, always choose the one with the best. paw geometry and the angle of disclosure.
Types of anchors: from classics to folding models
The market of water engines offers many designs, but not all of them are suitable for operation with the help of the airboardThe basic requirement for an anchor for PVC is safety, it should not have sharp edges that can pierce the balloon when handled carelessly or on a wave, and compactness is important, since space in the cockpit is limited.
The most popular options for small vessels are folding structures, which allow you to minimize the space occupied in the transport bag. Hall anchor And the classics, or modifications of it, have proven to be very good because they can dig deep into the ground, but the classics are often too heavy and bulky for two or three-seater boats.
- 🪂 Anchor-parachute (drill-ancair): Perfect for quick braking on the current, but poorly keeps the boat in place in lateral winds; requires a large supply of falin.
- 🦀 Cat anchor (folding): The most common choice; the paws fold to the spindle, which is safe for PVC, but on a very hard clay bottom can slide.
- 🧱 Gravitational anchors (pancakes, stockings): They work only due to weight; good for a rocky bottom, where the legs do not have anything to hook, but require a significant mass.
- ⚓ Denforth anchor: It has excellent holding power, but its long legs can be dangerous to the inflatable floor and cylinders when lifted.
Special attention deserves iron-anchorThey're often handmade, they're concrete or lead castings with a built-in loop, and they're also cheap and they don't have sharp corners if they're well-crafted, and they're heavy weights with relatively low holding capacity on soft soils.
⚠️ Attention: It is strictly forbidden to use homemade anchors with sticking reinforcement or sharp welds inside a PVC boat. One careless jerk can cause puncture and rapid flooding.
When choosing between a purchased and homemade product, weigh the risks: factory folding anchors made of stainless or galvanized steel are quality-checked and have a safe design. If you make anchor yourself, be sure to round all the corners and use smooth surfaces that contact the balloon.
To store the cat anchor in the boat, use a special case made of dense fabric or an old car camera, which will protect PVC from abrasion by the sharp edges of the legs during pitching.
Falin: choice of material and length
The link between the boat and the anchor is the falin, and it is a mistake to think that any rope will do. Anchor falin It's a very stressful thing to break and abrasion, and it's not acceptable to use cotton or fast-rotting threads, and the best choice is a synthetic cord made of polyamide (nylon) or polypropylene.
The nylon cord has an important property: it stretches. When a boat snags in the wave, nylon absorbs the impact, reducing the load on the duck mounts and the anchor itself. Polypropylene cord is cheaper and does not sink, which is convenient, but it is harder and less cushioning. Cord diameter The size of the boat should be equal to that of the boat: 4-5 mm is sufficient for small vessels, 6-8 mm for large ones.
The length of the falinah must be 3-5 times the maximum depth in the parking lot, this is necessary in order that the anchor lies on the bottom, and not hanging in the water column, otherwise its legs will not be able to properly catch the ground. If the depth is 3 meters, the length of the abandoned anchor should be at least 9-15 meters.
Formula for calculating the length of the faline: L = H * KWhere:
L is the length of the faline
H = maximum depth
K is the coefficient (from 3 to 5)
It's important to attach the falin to the boat properly, and you can't tie it directly to the duck unless you can quickly drop anchor in an emergency. booster Or a simple loop that can be easily untied in one jerk, and it's also recommended that you use a vertebra between the anchor and the faline to prevent the cord from curling.
Installation and anchoring schemes
The right anchoring determines whether the boat will stand still or turn sideways to wave. For PVC boats, the safest and most efficient is anchoring from the nose. This allows the boat to take the wave and the wind with its nose, which is the most stable position. An anchor from the stern on an inflatable boat is dangerous: when a strong wave is, the boat can start to overrun, and it risks flipping over.
The process of anchoring is as follows: the boat approaches the point of parking against the wind or current. The anchor sinks to the bottom (does not throw!), then the boat is allowed to slowly drift back, choosing the slack of the phalin. When the cord is tightened, the anchor must burrow. If the boat continues to demolish, the procedure is repeated or the length of the falin is added.
- 📍 Single anchorage: The boat is at one anchor, turning in the wind, suitable for calm water.
- 🔺 Anchor stretch: Two anchors are used (from the bow and from the stern), which locks the boat in one position, preventing it from spinning. Effective in strong lateral winds.
- 🌊 Anchor on the current: Demolition is taken into account. The anchor is placed upstream to keep the boat going down to the fishing point.
In some cases, like deep-water plumb fishing, you need absolute immobility, and you can use a two-armor system that's angled, but for most amateur anglers, you need a well-chosen anchor from the nose.
⚠️ Attention: Never wrap the falin on an arm or leg! With a sharp jerk of the anchor or braking the boat, this can lead to severe injuries, fractures or even a limb torn off.
☑️ Checking before anchoring
Features of operation on different soils
The type of bottom soil is a factor that is often ignored when choosing a universal anchor, but it is the soil that determines whether the anchor will hold or crawl. Ilisty bottom It requires anchors with wide legs that won't fall too deep, but will provide a larger area of grip. anchorage and Denforth.
On a rocky bottom, vellum anchors are often useless -- they just slide between rocks. Only weight is effective. They use heavy stockings stuffed with stones on the spot, or special anchors with hooks that cling to protrusions. But hooks are dangerous for PVC, so it's better to use inertia and mass on rocks, or to look for pockets between rocks.
The grassy bottom is a real problem for anchoring. The grass acts as a lubricant, and the anchor slides across the surface. In these cases, the drag method helps: the anchor drags along the bottom until it catches on to a snag or a bush. Sometimes you have to use anchors with a vertical stem that can penetrate the grass layer and hook into the ground below.
For anglers who change positions, it's important to have information about the bottom relief. A sounder or knowledge of a body of water will help you choose the right type of anchor in advance. If you often change locations with different bottoms, it makes sense to have two different anchors in your arsenal: a lightweight clawed one for sand and a heavy gravitational one for stone.
What if the anchor is dead in the ground?
If the anchor is stuck (for example, in snags or stones), do not try to pull it with the power of the motor - this is dangerous for the transom. Swim as close as possible to the anchor, select the slack of the phalin and tie it to the nose duck. Then slowly surrender back, changing the angle of thrust. If it does not help, you can use a wedge or a buoyer button if they were installed beforehand. At the last resort, tie the falin to the buoy and leave the anchor, returning later with a more powerful means.
Safety and maintenance of equipment
Anchorage requires regular maintenance, especially after operation in salt water or muddy conditions. Metal parts are prone to corrosion, which weakens the structure. After each fishing, the anchor must be washed with fresh water, dried and lubricated mobile joints (if any) with a consistent lubricant. Rust Not only spoils the view, but also creates sharp burrs, dangerous for the boat.
Pay special attention to the condition of the faline. Synthetics are exposed to ultraviolet light and mechanical wear. If you notice that the cord has become fuzzy, lost strength or has become rubbed, it should be replaced immediately. A break in the anchor at depth or on the current is not only the loss of the anchor, but also a potential emergency situation.
Keep the anchor separate from the boat, if possible, or in a rigid container. When deflated, PVC tubes are more vulnerable to puncture. If the anchor is stored in the same bag as the boat, make sure that there is a dense tissue layer between them.
Keeping an anchor safe is a key to a safe fishing experience. Always carry a knife with a floating blade or a string cutter. When the falin is coiled on a motor screw or tangled in your legs, being able to cut a synthetic cord quickly can save a life.
The main principle of choosing an anchor for PVC: the safety of cylinders is more important than holding capacity. It is better to take the anchor a little heavier, but with smooth streamlined shapes than light, but with sharp angles.
Can I use car cameras or disks instead of anchors?
Car discs are only possible as a gravitational anchor on a hard bottom, but they have sharp edges and can damage a boat. Sand-filled car cameras are a popular budget option (anchor-stocking) that is safe for PVC but has low current retention power, and should only be considered as a temporary solution or for calm parking.
Which anchor is better for a 320 cm PVC boat?
For a boat with a length of 320 cm (for example, Frigate, Hunter, Cayman), the best choice will be a folding anchor-cat weighing 3-4 kg. It is compact, safe for inflatable sides and has sufficient holding power for moderate conditions. If you plan to fish on a strong current, the weight can be increased to 5 kg or use a system of two anchors.
Why isn't the anchor holding the boat?
There may be several reasons: insufficient weight of the anchor, inappropriate design of the paws for this type of soil, too short falin (the anchor hangs in the water and does not press to the bottom) or improper anchoring technique (the anchor is thrown, not lowered, and did not have time to burrow).
Do I need to lubricate the folding anchor?
Yes, the paw folding mechanism must be lubricated periodically, especially after contact with salt water, and any water-resistant lubricant (such as Litol-24 or specialized marine lubricants) will do this, which will prevent the mechanism from jamming in the open or closed state.