Registration of the boat: how to correctly apply the number on the PVC boat

Owning a boat is not only a pleasure to day on the water and fish, but also a legal responsibility. Under current law, every small vessel subject to state registration must have a clearly visible tail number. For owners of inflatable structures made of polyvinyl chloride, this issue is especially acute, since the surface of the material has its own specific properties that require special treatment in marking.

Improper identification can result in fines from GIMS inspectors or even delaying the vessel until the violations are corrected. The process requires accuracy, the use of the right materials and strict adherence to regulated dimensions. In this article, we will discuss all the nuances, from the choice of location to the final varnishing, so that your room is not only legal, but also durable.

Many owners PVC boats It's wrong to think that it's enough to just write numbers with a marker or stick a piece of paper, but the law requires resistance and contrast. Incorrectly selected paint can react chemically with the material of the balloon, damaging its structure, or erase after the first season, so it's important to study the requirements in advance and prepare the necessary tools.

GIMS requirements for the side numbers of small vessels

Before we get to the practical part, you need to clearly understand what standards are set by the state inspectorate: the number consists of an alphanumeric code assigned at registration and the flag of the Russian Federation. The basic rule is that the signs must be contrasted with the color of the side and read well from a distance of at least 300 meters.

The letters and numbers are strictly regulated at 150 millimeters in height, the width of the sign is usually 100 millimeters, and the thickness of the font lines is 15-20 millimeters, which cannot be changed arbitrarily, since the inspector has the right to issue a prescription to bring the marking into compliance with the norms, the use of non-standard fonts is also discouraged, it is best to use classic chopped marks.

⚠️ Attention: The plates shall not be placed on the transom or bottom of the boat, and shall be placed on the upper part of the side, 1/4 of the length of the vessel from the forehead (nose) on both sides.

It's important to remember that the color of the signs must be different from the color of the side. If your boat is dark, the number must be light, and vice versa. Inflatable boats often use white, which is great for blue, gray or green cylinders. Ignoring the contrast requirement is one of the most common reasons for fines when checking documents on the water.

Selection of materials: paint, varnish and stencils

Choosing the right coloring compound is a critical step in how long the labeling will last. Conventional oil or nitro paints may not stay on the slippery surface of PVC or even corrode the material. The optimal solution is specialized paints for rubber and PVC, which have high elasticity after drying.

Along with the paint, you need to choose a quality varnish that will create a protective layer. The varnish should be resistant to ultraviolet and salt water if you plan to venture into the sea. Some craftsmen recommend using car enamel, but only after carefully checking their compatibility with the material of the boat in an inconspicuous area.

• 🎨 Specialized paints for PVC (e.g. Tiflex or analogues) – provide better adhesion and flexibility.
• 🛡️ Polyurethane lacquers create a strong film that protects numbers from abrasion and burnout.
• 📐 Stencils - You can make yourself from dense plastic, film or buy ready-made sets in the store.

And you should pay special attention to solvents, which are not only used to dilute paint, but also to degrease the surface before work, but aggressive solvents like acetone can damage the top layer of the boat, making it sticky or matte, and you should use soft compounds recommended by the boat manufacturer, or ordinary alcohol.

Surface preparation and stencil production

The quality of the surface preparation directly affects the result: PVC is a material that often has a protective layer or simply accumulates dust and fat during operation. If you apply the paint on a dirty surface, it quickly begins to peel off with rags. So, thorough cleaning of the application site.

Use a soft rag and a degreaser. The movements must be smooth, without much friction, so as not to damage the fabric. After degreasing, allow the surface to dry completely. Even microscopic drops of moisture under the paint will cause bubbles and defects in the future.

Stencil making is a creative process, but it requires precision. You can print the right size (150 mm high) on a printer, paste it onto a dense film or thin plastic, and cut it with a sharp knife. It is important that the lintels in the letters (like the letter "P" or "B") are saved, otherwise the paint will flow in.

Parameter	Meaning	Admission
Height of sign	150 mm	± 5 mm
Breadth of sign	100 mm	± 5 mm
Thickness of lines	15–20 mm	No deviations.
Distance from nose	1/4 length	± 10 cm

Step by step instructions: how to apply a number to the balloon

The application process can be divided into several successive steps, and any failure of the technology can ruin the result, and it is best to do the work in a room temperature and low humidity, so that the paint dries evenly.

First, you need to fix the stencil on the side, and you can use paint tape to fix it, which leaves no trace of glue, and make sure that the stencil fits tightly around the perimeter, otherwise the paint can leak under the edges, making the lines uneven.

You should apply the paint in thin layers. Don't try to paint everything the first time, it will lead to leaks. Better make two or three thin layers, let each one dry according to the instructions on the jar. Once the paint is dry, but until it is completely hardened, you can carefully remove the stencil so that the edges do not have time to grasp dead and come off with the film.

The final step is to varnish, and you're going to put the varnish on top of the dried digits to protect you from mechanical damage and burnout, and you're going to make 2-3 layers of varnish, drying each layer, and you're going to have a "lens" effect, and you're going to have a volumetric and brightness.

⚠️ Attention: Do not dry the boat with the number applied under direct sunlight or on a battery. High temperatures can cause uneven expansion of the material and deformation of fresh paint.

Alternative methods of marking: stickers and engraving

If you don't want to mess around with paint and varnishes, there are alternatives, and the most popular of them are ready-made vinyl stickers, which are self-adhesive films with numbers already cut out. The advantage of this is that they're simple: they remove the protective layer and glue it, but the life of these stickers on inflatable sides is often shorter than that of paint, because when the boat is constantly bent and inflated/blown, the edges can start to move away.

The other option is thermal application, which is heated with a hair dryer or an iron (through a fabric) and melted into the top layer of PVC, which is very durable, but requires special equipment and skills, and the inept use of hot air can lead to burning through the balloon.

Can markers be used?

There are special permanent markers for PVC, but their persistence leaves much to be desired. After the active season, the number may fade or disappear, which will lead to problems with GIMS. This method is only suitable as a temporary solution.

Engraving or squeezing a number on PVC boats is not used because it will violate the tightness and integrity of the fabric. Mechanical exposure to a sharp object is unacceptable, so the choice is between chemical (paint) and adhesive (sticker) methods.

Typical errors and care of the license plate

Even skilled craftsmen sometimes make mistakes that negate all efforts, one of the most common is saving on materials, cheap paint quickly fades out in the sun, losing contrast, and cheap lacquer cracks, and eventually, after a year, you have to redo the work again, spending time and money.

Another mistake is choosing the wrong time of year: applying a number in cold (below +10 °C) or in wet weather will cause the materials to not polymerize correctly, the paint may remain sticky or peel off in layers when first contact with water.

• ❌ Ignoring degreasing - the main reason for the peeling.
• ❌ Too thick a layer of paint - leads to long drying periods and bubbles.
• ❌ Geometry disturbance Curved figures are difficult to read and raise questions from inspectors.

Caring for the license plate is simple: after each foray into the water, it is advisable to rinse the boat with fresh water, washing away salt and dirt. Do not rub the number with hard brushes. If you notice small cracks in the varnish, it is better to update the protective layer in a timely manner, without waiting for the digits to damage.

Frequently Asked Questions (FAQ)

Can I just put a number on one side of the boat?

No, according to the rules of registration of small craft, the tail number must be marked on both sides, and the absence of marking on one side is a violation and can lead to a fine.

What to do if the number is erased or becomes unreadable?

If the paint is worn, you need to clean the residue, degrease it and apply a new layer, and if the number has changed or is lost documented, you need to contact the GIMS to obtain a duplicate certificate.

Do I need to register a boat if it has a motor less than 5 hp?

Since 2017, boats weighing up to 200 kg inclusive with a motor up to 8 kW (about 10.88 hp) are not subject to registration, however, if your boat is heavier or the engine is more powerful, registration and number are required.

Which typeface is best for the room?

Standard serif-free chopped fonts (e.g. Arial Bold) are recommended, but are clearly legible and can be readable, and curvy or decorative fonts may be considered by the inspector as a violation of the visibility requirements.