Going out to sea on an inflatable vessel is always a balance between saving on transportation and ensuring maximum safety. Unlike calm river waters, the sea element dictates its own rigid rules, where every detail of the design can be decisive in an emergency. Many beginners mistakenly believe that any modern model of polyvinyl chloride is suitable for seafaring, but practice shows the opposite: the specificity of salt water, excitement and winds requires a special approach to the choice of the choice. floater.
The main difference between marine modifications is the reinforced design of the bottom and cylinders, which must withstand shocks against a steep wave. Standard river variants often do not have sufficient safety margin and can be overturned even in a moderate storm, which is why you need to study thoroughly before buying. passport The product and understand the conditions for which it was designed by engineers.
In this article, we will explore the key aspects of selecting, operating and maintaining marine inflatable boats. tissue-density It plays a secondary role in comparison with the design, and how to properly prepare the vessel for the first serious exit.
Key differences between sea models and river models
The first thing to consider when choosing is bottominessA boat must have a distinct V profile that allows it to effectively dissect the wave rather than slap it on the surface. The flat bottom, which is characteristic of river flat-bottoms, becomes a danger at sea, because it is subject to severe lewdness and the risk of flipping over in the side impact of the wave.
The second critical parameter is the presence of quiltIt's a rigid inflatable structure that runs all the way down the bottom, which ensures the longitudinal rigidity of the hull. Without the keelson, the soft bottom will be a wave-cruising structure, making it almost impossible and extremely dangerous to operate the vessel. Kielson also takes the brunt of the impacts, protecting passengers from hard contact with water.
⚠️ Note: The use of boats without inflatable pendant on the excitement above 0.5 meters is strictly not recommended, as this can lead to loss of control and rollover.
Also, marine options are equipped translatantThey can withstand the powerful motors needed to overcome the oncoming wind and current, and often the transom is made of multi-layered reinforced plywood, which prevents it from deforming under load.
The PVC density myth
Many believe that the density of fabric 1100 g / sq.m. is better than 750 g / sq.m. In practice, for seaboats more important than the number of layers and quality of reinforcement, not just the weight of a square meter of fabric.
Body design and safety system
Water safety is directly dependent on how the bottom of your vessel is designed. NDMA This design consists of many transom partition beams that, when pumped, create a rigid surface that resembles an airplane wing in the section.
The advantage of NDND is that it provides excellent wave germination and shock amortization, but it also has weaknesses: if one section is punctured, the stiffness may be partially lost, although buoyancy will remain, so it is important to check the condition of the valves and joints regularly.
- 🌊 Built-in stringers - inflatable tubes on the sides, which give additional rigidity and protect against lateral rollover.
- 🛡️ Protective bottom - an additional layer of wear-resistant material that protects against sharp stones and shells in shallow water.
- ⚓ Business rings - reinforced mounting points located around the perimeter for reliable mooring and towing.
It is important to note that the availability escape valve In cylinders, it is a requirement for boats to use these devices to automatically release the excess pressure that comes from heating in the sun, preventing the seams from rupturing.
For the sea, choose only boats with an inflatable keelson and a NDND system, as they provide better handling and safety on the wave.
Materials and their resistance to the marine environment
The aggressive marine environment, rich in salts and ultraviolet light, places high demands on materials. reinforced polyvinyl chloride (PVC) This material consists of several layers of polymer-coated fabric, which ensures high strength and tightness.
Special attention should be paid to the quality of the seams. In marine models, the seams should be made by the method of hot-glue It's a two-part polyurethane glue, and cold gluing or thread stitching, when wet and dry, quickly loses its properties, leading to stratification.
The fittings must also be made of materials. stainless steel AISI 316 or high-quality plastic: Cheap metal elements quickly corrode, rust and can stain clothing or tear the fabric of the cylinder.
| Characterization | River model | Naval model | Impact on operation |
|---|---|---|---|
| Tissue density | 750-850 g/sqm | 900-1100 g/sqm | Puncture resistance |
| Type of bottom | Flat/Slate | Inflatable (NPD) | Rising on the wave |
| Stitches | Cold gluing | Hot gluing | Tightness and durability |
| Tranza | Folded/Folded | Built-in reinforced | Engine power |
Size and loading capacity selection
Choosing the optimal size of a boat is a trade-off between mobility and comfort. For sea trips alone or two, the minimum length is considered to be acceptable. 3.2-3.6 metersShorter vessels at sea become unstable and can be flooded with water when faced with a headwind.
The load capacity has to be calculated with a margin, and you have to add up the weight of all the passengers, the weight of the motor, the weight of the fuel, the anchor, the gear and the food supply, and you have to increase that by 20 to 30 percent, because you have to add that up. passport capacity It is often indicated for ideal conditions.
Wide models offer greater stability, which is critical when fishing or moving inside a boat: Narrow and long vessels run faster but require more precise steering and experience from the driver.
Preparation of the boat for the sea
Before each trip to the sea, a thorough inspection of the vessel is required, even a small grain of sand trapped under the valve can cause a gradual loss of pressure. Check the pressure in all compartments with a pressure gauge, as it is difficult to determine the lack of air in a hard cylinder by eye.
Pay special attention to the mounting of the motor. On the sea wave, the transom plate is under tremendous stress, and a poorly secured motor can fly overboard with part of the transom. Use additional safety ropes.
- 🔍 Visual examination Check the fabric for scuffs, especially in areas of contact with soil or stones.
- 🔧 Checking fittings Make sure that all handles, rings and stretch marks are securely secured.
- 🛶 Presence of STIs - the boat should always have a repair kit, a pump and an anchor with a line.
☑️ Pre-start check
Features of operation in storm conditions
The sea is unpredictable, and even a planned walk in calm can take you by surprise by a storm. The main rule is never to go with your forehead on a high steep wave if the boat's speed is not enough to cross the ridge. lagoon (Steam to wave) or forward at an angle, extinguishing the speed.
When the wind is strong, the sailing of an inflatable boat becomes a problem. High cylinders work like a sail to demolish a boat. storm-anchor (floating anchor) which stabilizes the course and prevents the boat from turning side to wave.
⚠️ Note: Going out to sea with a wind forecast of more than 15 m / s on an inflatable boat without special permission and experience is prohibited by safety regulations.
If you are caught in a heavy fog or storm, do not try to fight the elements, it is better to slow down, turn on navigation lights and, if possible, find shelter near the shore or in the bay.
Always bring a sealant with a spare valve and glue. Repairing ashore in an emergency can save your trip.
Post-sea operation care and storage
Salt water is the main enemy of any technology, and after each voyage, the boat must be thoroughly washed with fresh water, and the salt, as it dries on the fabric, crystallizes and begins to corrode the polymer coating, making it brittle and vulnerable.
Drying the boat should be in the shade, in the straightened form, direct sunlight combined with residual humidity can start the process. PVC degradationKeeping the boat deflated is better, but not stacking it in a tight roll on a permanent basis - it is better to keep it half-blown or straightened.
Regularly treat the fabric with special protective compounds (UV protectors) that extend the life of the material and keep it elastic, and this is especially true for boats that often stay in the sun.
How often should seams be checked on boats?
It is recommended to carry out a complete check of seams and leakage at least once a season, and after each intensive use in storm conditions, pay special attention to the places of sticking the transpants and bottom linings.
Can I use a car pump for pumping?
Use the car compressor can only be used for primary pumping up to 60-70% of the volume. the final adjustment of pressure must be done with a foot or hand pump with a pressure gauge, so as not to exceed the permissible norms and control the process.
What if the boat started poisoning the air in the sea?
Don't panic. If pressure loss is slow, use a hand pump to maintain pressure. If the situation is critical, put on life jackets, use anchor for stabilization and call for help. Don't try to paddle against a strong wave.