The type of cover for the bottom provided in the scope of delivery. Coatings are mainly used to provide extra rigidity if the bottom itself is too soft; this is true mainly for flat tension bottoms and boats with inflatable keels (see "bottom type"). Specific options might be:
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Rack slant. Flooring of several wide transverse rails, usually connected by a flexible mount. Thanks to this fastening, the slate can be folded into an "accordion" for storage and transportation, while in working condition the coating still turns out to be quite rigid.
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Rigid plywood flooring. Rigid coating made of waterproof plywood, usually, typesetting — consists of several separate segments, and for storage and transportation is disassembled for compactness. Plywood coatings combine good rigidity and low cost, which makes them very popular. In terms of strength and reliability, they are somewhat inferior to aluminium decking, but in most cases this drawback is not critical.
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Rigid aluminium flooring. Type-setting coating of aluminium segments fastened together when installed in a boat. In general, it is similar to plywood (see above), but aluminium is more durable and reliable, and it is absolutely not subject to corrosion. On the other hand, this material is expensive, which is why it is much less common.
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Inflatable flooring (NDVD).... NDVD stands for “high pressure inflatable bottom”, however, this design should not be confused with an inflatable bottom (see “Bottom Type”): in this case, we are talking about a removable flooring. Due to the high pressure, such flooring turns out to be very rigid — noticeably stiffer than the bottom of the NDND type (although softer than plywood / aluminium coating). At the same time, the inflatable cover can be compactly folded during non-working hours, which ensures convenience in storage and transportation. Among the disadvantages of this option, sensitivity to damage can be noted.
— Without additional coatings. The absence of any coating in the scope of supply. Depending on the type of bottom (see above), this equipment may either mean that the boat does not require additional coating in principle, or that the flooring must be purchased separately. The second option is convenient in that you can choose the flooring at your discretion, without relying on the decision of the manufacturer.
