abbreviation NDMA It's a common feature in inflatable boat catalogs, and it raises questions for newcomers who are just beginning to understand the intricacies of watercraft, and it's a marking that marks the type of bottom design that makes it very different from classic models with hard plywood or aluminum floors. Understanding what's behind these four letters will help you avoid mistakes and properly assess the vessel's capabilities for specific tasks.
The term is deciphered very simply: Low-pressure inflatable floorThis means that instead of inserting solid materials (plywood, dural) or high pressure inflatable floor (HPF), it uses a soft inflatable structure that fits to the bottom of the boat, and has a unique set of specifications, making them popular among spinning fishermen and water lovers who value comfort and compactness.
Unlike hard floorboards, which require assembly and disassembly, or expensive HDL floors, the design of NDL offers a trade-off between gentleness and ease of use. technicalityWe will then go into detail about the design, advantages and disadvantages of such boats so that you can make an informed decision.
Design features and flooring
The basis of the boat marked with NDND is a multi-layered inflatable structure that is located inside the hull. Unlike the high-pressure floor, which is pumped to 0.6-1 atmosphere and becomes hard as a board, the bottom of the low pressure has a more complex internal structure. It consists of many vertical strands that connect the upper and lower shells, but the density of these strands is lower, and the structure is designed for less internal pressure.
It is important to understand that rigidity It's a relative gender, it takes shape when pumped, but it's soft enough to bend under human weight, which is why these boats often come with extras: longitudinal and transom cans (seats) that distribute the load, or special inserts made of hard plastic that prevent the feet from sliding the floor, and without these elements, it's uncomfortable to stand on the bottom, and in some cases, it's dangerous to the integrity of the structure.
The material used to make BND is the same reinforced PVC as the cylinders, but with a reinforced structure. In some models, stiffened foam or plastic ribs may be present inside the inflatable floor, which help to keep the shape. Production technology allows you to create the bottoms of complex geometry, repeating the contours of the boat, which has a positive effect on hydrodynamics.
When buying a boat, be sure to check with the seller whether the set includes rigid inserts (liners) for the floor. Without them, long parking or active fishing can be uncomfortable.
Comparison with other types of bottom: NDND vs. NDDP and floorboard
To understand what a NDND boat is, a comparison with other common floor types is needed to help understand its place in the hierarchy of inflatable vessels, with rigid floorboards (plywood/aluminum) and high pressure inflatable floors (HDPL) being the main competitors.
The main difference from solder boats is the speed of assembly, and if it takes time, physical effort and clean space to install plywood sheets (floorboards), then it is a good idea to build them. NDMA But paioles provide a platform that is absolutely rigid, that you can stand and walk on, which is not possible with low pressure inflatable bottoms. Pipe boats are often heavier to transport because of the weight of the plywood, but cheaper to manufacture.
Comparison with HPD reveals differences in comfort and price. HPDF floors are pumped to a solid board, they don't require extra cans for rigidity and allow high speeds. HPDF boats lose in stiffness and speed, but they gain in price and weight. In addition, HPDF is often softer to the touch, which is nice when you have tactile contact, for example, when you're relaxing with children.
Below is a table that systematizes the main differences between the types of bottom:
| Characterization | BNDD (Low pressure) | NDPE (High pressure) | Pyol (Phanera/Aluminum) |
|---|---|---|---|
| Surface rigidity | Soft, flexing. | Hard as a board | Absolutely tough. |
| Assembly time | Minimum | Medium (needs pump) | Prolonged (file installation) |
| Weight gathered | Light. | Medium/Severe | Heavy. |
| Cost | Low/Medium | High. | Low/Medium |
Benefits of using boats with NDND
Despite the more technologically advanced, low-pressure inflatable floor boats remain in demand. compactness When assembled, the boat is a soft package that is easy to pack into a backpack, and the absence of rigid elements allows you to shove the packed case into any free space in the trunk of the car, between bags or even into the cabin of public transport.
The second big advantage is the speed of deployment on the water. You don't have to spend 15 to 20 minutes putting up sleighs, fixing stringers and leveling the floor. Just pump the cylinders and the boat is ready to descend. This is especially true for those who like to go fishing fast after work or on weekends, when every minute counts. Also worth noting is the low center of gravity: because the floor is low, the stability of the boat on the water is quite high, although it is inferior to hard analogues.
Comfort is another factor: the soft bottom is pleasant to the touch, you can walk barefoot without fear of splintering or hitting. For family holidays, fishing with children or just for a quiet pastime on the water is a significant plus. In addition, such boats are often cheaper than models with a floor of HDL, making them available to a wide range of buyers.
- 🚀 Instant alert: It doesn’t require assembling complex structures, just pump and swim.
- 🎒 Transportability: It is ideal for tourists and owners of small cars.
- 💰 Affordable price: Often cheaper than counterparts with a hard floor or HDL.
- 👶 Safety and comfort: A soft surface eliminates injuries from falling, ideal for children.
Disadvantages and limitations of operation
But when you choose a NDNDM boat, you have to be very aware of its limitations. lack of a rigid platformYou can't stand still, especially in turbulent weather or when you're spinning, and the bottom will bend under your feet, creating an unstable position, and this can be critical for fishermen who use sounders that require a stable position of the sensor, or for those who prefer to fish standing up.
The second major drawback is hydrodynamics and speed: a soft low pressure bottom cannot provide the perfect smoothness of the surface like a HDPL floor or aluminum. At high speeds (above 15-18 km/h), such a boat can start to "travel", keep its course worse and consume more fuel. Gleaching on HPD is possible, but it is less efficient, and entering mode requires more engine power.
⚠️ Attention: Do not attempt to reach maximum speed on a boat with NDND in heavy chop. Soft bottom can collapse under water pressure, which will lead to loss of control and a sharp roll.
Also worth mentioning is durability. Although modern materials are durable, constant deformation of the floor (compression-expansion) with each pumping and blowing over time can lead to fatigue of the material or to the unstuck internal partitions. Unlike HDL, which holds its shape for years, NDL requires more careful treatment. In addition, on this day it is more difficult to attach additional equipment, such as sensor brackets or anchor mounts, without the use of special adapters.
Can I make the floor of the NDNDD harder?
In theory, some craftsmen put a sheet of plywood or a thick foam on top of the inflatable floor inside the boat, but this increases weight, reduces the already low speed, and can damage the inner surface of the cylinders when frictioned.
What tasks are ideal for NDND boats
So from the above, you can formulate a portrait of the ideal user of a low-pressure inflatable floor boat. water-touristThey travel long distances to their starting point by car or public transport and then descend to the water, and for them, weight and packaging volume are more important than speed.
The second segment is those who enjoy quiet fishing from the shore or in quiet backwaters, where you do not need active boating and plane at high speeds. If your goal is to sit with a fishing rod in a quiet pool, swim with a child or dive with a mask in the sea in calm, then NDNDM is an excellent choice. second-hand In the garage, so as not to drive the main boat or PVC boat with an engine for a short fishing trip.
And the ease of operation (no need to explain to the customer how to assemble the floor) and the inability to lose parts (all inflatable) make NDNDM popular for rent. In emergency situations, when you need to quickly deploy a rescue boat, assembly speed plays a crucial role.
- 🏕️ Wild tourism: rafting on rivers, where compactness of cargo is important.
- 🎣 Sitting fishing: fishing for a float or donkey in calm water.
- 🏊 Recreation: Swimming, sunbathing on the water, riding children.
- 🚑 Rescue posts: Quick deployment and ease of use.
☑️ Are you ready to buy a NDND boat?
Operational rules and inflatable floor care
In order for a boat to last long, you have to follow a number of rules, first of all, pressure control. Although the pressure is low, it needs to be checked with a gauge, especially when the air temperature changes. In the sun, the air in the cylinders and the bottom expands, and the pressure can rise to critical values, which will lead to deformation of the seams. Re-pumping In the heat, it is a common cause of damage.
Drying the boat before packing is a ritual, and the moisture left between the inflatable floor and the outer cylinder creates the perfect environment for mold and fungus that destroy PVC and glue seams. If you've packed a wet boat, you have to get it out and dry it completely as soon as possible, and it's better to keep it straightened or at least not tightly folded to avoid the curvatures of the floor material.
⚠️ Attention: Never use high-powered compressors without pressure control to pump NDNDT. The risk of inflating and rupturing the internal partitions is very high. Use a hand or foot pump to control the stiffness with your hand.
Keep the bottom from sharp objects. Despite reinforcement, puncture with a stone or branch is easier than piercing an aluminum leaf. When mooring to the shore, use special ladders or lay a mat to avoid damaging the material on shells or sharp stones. Regular inspection for scuffs and minor punctures will help avoid trouble on the water.
The secret to longevity of a NDND boat is to dry it completely before it is packed and stored in a warm, dry place, and moisture is the main enemy of any inflatable structure.
The final choice: is it worth buying?
The NDNDB is a specific but important segment of the boating market, not claiming to be the fastest or the toughest, but offering a unique combination. mobility If your priorities are in the "arrive-nadul-swim" plane and you value the opportunity to put the boat in your backpack, that's your choice.
However, if you plan to actively fish with standing, trolling at high speeds or using a boat as a primary means for frequent trips to the sea with chop, it is better to consider options with flooring of HDL or hard floorboard. Understanding what is HNDL and what restrictions this design imposes will save you from frustration. In the end, the perfect boat does not exist, there is only a tool that is most suitable for your specific tasks.
With proper use and compliance with the rules of operation, a low-pressure inflatable floor boat will serve faithfully for many seasons, giving the joy of communicating with water. The main thing is to correctly assess your needs before purchase, weighing all the pros and cons of the described design.
Can I put a powerful motor on a boat?
Technically, you can, if the passport power of the boat allows. However, due to the soft bottom and sailing of the hull, the effective speed will be limited. A powerful engine will simply waste fuel by breaking the soft wave, not accelerating the boat. The optimal range is engines up to 5-6 hp.
How to repair a puncture in the bottom of the NDND?
Repairs are done in a similar way to cylinder repairs: puncture cleaning, degreasing, PVC glue and patching. The difficulty can only be in access: sometimes it is easier to remove the inner inflatable floor through the valve (if the design allows) or repair through process holes, but more often repairs are done without removing the bottom if the puncture is available.
What is the difference between a simple inflatable mattress?
Unlike a mattress, NDND has a complex internal structure with vertical strands that prevent the bottom from swelling into a ball and keep a flat shape, and NDNDND material has high tensile strength and UV resistance, which is not typical for cheap inflatable products.