Peace of mind on the water while fishing or resting depends on the reliability of the parking lot. Many owners of inflatable vessels underestimate the importance of correct calculation of mass. anchorageBut the wind pressure on the bloated PVC tubes creates a huge sailing speed that can move even heavy construction if the anchor is not properly matched.
There are several time-tested calculation methods that take into account not only the length of the hull, but also the operating conditions. In this article, we will examine the physical principles of vessel retention, consider the formulas for different types of bottom, and make a table of the balance of the weight of the anchor to the size of your boat.
Wrong choice. anchorage It can cause not only demolition on the fairway, but also damage to the transom or cylinders during sharp jerks, so let's determine how much weight your boat needs to avoid drift even when the wind is amplified.
The Physics of Retention: Why Weight Matters
The main task of an anchor in an inflatable boat is not just to lie on the bottom, but to create enough force to counterwind and current. PVC They have very little sediment in gear, but they have a tremendous sailing surface, and it's the wind that's the fishing man's main enemy, not the current.
There's a classic empirical formula that says that the mass of the anchor should be about 1/10th of the length of the boat in meters, but this rule doesn't always work. anchor or its modification, its weight should be sufficient to overcome the force of friction against the ground when the rope is tensed.
⚠️ Attention: Using an anchor too heavy for a lightweight inflatable boat can deform the transom board or cylinders with strong sticking or a sharp jerk. The optimal weight should allow the anchor to lie on the bottom, rather than hanging in the water.
It's important to understand the difference between holding power and mass. cat anchor or folding-type structures Grapnel They rely on the ability of hooks to cling to the unevenness of the bottom, whereas a smooth sandy bottom requires precisely the mass or specific shape of the legs that cut into the ground.
Calculation of anchor weight by formula
For those who prefer accurate calculations, there is a proven formula that takes into account the displacement of the boat: the mass of the anchor (M) is calculated as the cubic root of the weight of the boat with the crew and equipment. However, for PVC boats, the simplified version that connects the length of the hull and the weight of the cargo is more often used.
If you plan to fish on the current or in places with frequent wind gusts, the weight of the anchor should be increased by 20-30% of the estimated. For pins on lakes, you can adhere to the minimum values. Below is a table showing the dependence of the mass of the anchor on the length of the vessel for standard conditions.
In the case of anchor-end It's important to consider the length of the chain, it has to be 3-5 times the depth of the parking lot, and if you use only the chain, the ratio decreases, but for PVC, the chain is rarely used entirely because of the risk of damage to the cylinders.
| Length of PVC boat (m) | Min. anchor weight (kg) | Optimal weight (kg) | Conditions (wind/current) |
|---|---|---|---|
| 3.0 | 1.0 - 1.5 | 2.0 | Style, weak current |
| 3.0 - 3.5 | 2.0 - 2.5 | 3.0 - 3.5 | Moderate wind |
| 3.5 - 4.0 | 3.0 - 4.0 | 4.0 - 5.0 | Strong wind, current |
| 4.0 | 4.0 - 5.0 | 5.0 - 7.0 | Open water |
For boats over 3.5 meters long, it is critical to have an anchor weighing at least 4 kg if you plan to catch on the current.
Soil types and design choice
The weight of the anchor is only half the equation. The other half is the ability of the structure to hold onto the bottom. On sandy or slurry ground, even a heavy object can slide if it doesn't have wide legs. anchor Hall or denforthAnd they will be slammed into the ground when they are stretched.
For rocky or grassy bottoms, which are common on rivers, cat anchors are best suited. Their paws easily penetrate between rocks or through algae. Here, mass plays a secondary role, the main thing is reliable engagement. A light but tenacious anchor will hold the boat better than a heavy pancake that will drag along the bottom.
- 🌊 Sand/Sil: It requires anchors with a wide area of paws (Denforth, Plow) that burrow into the ground, and the weight must be sufficient for the initial hook.
- 🪨 Stones/Picks: Perfect. cat anchor or GrapnelThe paws must be free to fold and have sharp ends to get into the crevices.
- 🌿 Grass/Algae: Complex soil. Often a combination of weight and shape is required, sometimes it helps to use two anchors or increase the length of the anchor end.
If you change fishing places often, the solution is simple. anchor It weighs about 3-4 kg. It is compact, will not damage the cylinders during storage and is quite effective on most types of soil.
What if the anchor is stuck dead?
If the anchor is stuck, don't pull the boat forward. Get as close to the staging point as possible, pick a rope slack and tie the end to the nose ruffle. Then slowly back up, pulling the rope 180 degrees to the paws. Often this helps to release the hook. If it doesn't, use a buoy ring if it was installed beforehand.
Materials of manufacture: steel, aluminum or lead?
The choice of material affects the final weight and dimensions of the anchor. Steel anchors are most common due to their strength and relatively low cost. metal-anchor You need to thoroughly wash with fresh water and dry.
Aluminum alloys are lighter, but to achieve the right weight, such an anchor will have a larger volume. This can be uncomfortable when stored in a boat bag. On the other hand, there are composite anchors with concrete or lead filling that are very compact and do not rust.
For PVC boats, an excellent choice is Zinc coating protects the base from aggressive aqueous environments. It is not recommended to use homemade anchors from reinforcement without proper processing, as rust can spoil the PVC tissue upon contact.
Grease the vertebral anchor with silicone lubrication before the season - this will prevent the folding mechanism from jamming at the most inopportune moment.
Organization of anchorage at PVC
The proper organization of the anchoring process is as important as the choice of the cargo itself. In inflatable boats, the anchor is always attached to the bow ditch. Fastening to the transom or sides can lead to the boat turning over in high winds, because the sail will work as a lever.
For ease of use, it is recommended to have two anchors: the main and the reserve (or cat anchor), the main one is set at the wind course, and the second one, if space permits, can be used for stretching so that the boat does not rotate around the axis, this is especially true when fishing in plumb.
⚠️ Attention: Never tie the anchor end rigidly to the rim without the possibility of a quick reset. In case of an emergency (squall, need to swim away urgently), you should be able to instantly release the anchor.
Use it. anchor-stack (Lin) made of synthetic materials that do not absorb water and do not rot. Polypropylene or nylon fall is optimal. The length of the falt should allow maneuvering at depths up to 10-12 meters with a margin.
☑️ Checking the anchor system before exit
Common mistakes in weight selection
One of the most common mistakes is to buy a decorative anchor that looks massive but is empty or filled with light material, visually it may seem heavy, but it will be blown off even by a weak current on the water. Always check the real weight on an electronic scale.
Another mistake is ignoring the length of the anchor end. If the depth is 4 meters and you let go of the 5 meters of rope, the anchor will hang in the water at an angle and not catch. The angle of attack of the legs should be minimal, which is why you need a margin of length (3-5 depths).
You should not save on the same Carbines and vertebrae: Cheap silumin fittings can burst under load, and you lose not only the anchor, but also the boat if the rope winds on the engine screw when you try to get off the ground.
- 📉 Undercarriage: The anchor is too light for current conditions, the boat is being demolished.
- 📏 Short molt: The anchor cannot lie on the ground properly and get caught.
- ⚓ Wrong shape: Attempt to use an anchor for sand on a rocky bottom.
How to increase the weight of the anchor in camping conditions?
If your anchor is light due to increased wind, use the anchor stone method. Find a suitable stone on the shore or bottom, tie it to the main rope above the anchor, or use a special weighting bag that can be filled with sand or stones on the spot.
Outcome recommendations and conclusions
The choice of anchor for a PVC boat is to find a balance between weight, shape and operating conditions. For most users, the optimal solution will be a folding anchor-cat weighing 3-4 kg for boats up to 3.6 meters in length, and more massive options (5+ kg) for four-meter and larger vessels.
Don't forget that security Better to take an anchor with a small weight reserve than to tremble with every gust of wind, afraid of being blown to the fairway, regularly check the condition of the rope and fasteners before each season.
Remember, there is no perfect anchor, but the right weight and soil type will make your fishing comfortable and safe. Consider everything from the bottom material to the weather forecast, and your boat will stay in place.
Can I use the anchor from a metal boat on PVC?
Technically, if the weight is adequate, but metal anchors often have sharp, rough edges that can damage cylinders, and it is recommended to use a cover or choose models with rounded shapes.
Which anchor end is better: a rope or a chain?
For PVC, synthetic rope (polyamide, polypropylene) is preferred. The chain is too heavy and can penetrate the bottom of the boat if handled carelessly. The chain is only appropriate as a short fragent (1-2 meters) at the anchor itself to improve the angle of attack, but not as a main molt.
Do I need to wash the anchor after fishing?
Fresh water washes away salt, sand and silt, which cause metal corrosion and rope rotting, and this will extend the life of your equipment for several seasons.
What if the anchor is stuck between the stones?
Don't try to pull it out with motor power, it's dangerous. Swim as close as possible to a point, pick a slack, tie the end to your nose and slowly back up. If it doesn't work, sometimes you have to dive or use a detachment mechanism if it's designed.