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We have been talking a lot lately about fairings (here you can find all our videos). Today we are not going on technical terms or other peculiarities, but on a simple concept, but one that is often not clear.
Let’s clear the air with a “practical” illustration of the difference between overall length (which includes appendages), hull length, and the waterline length of a powerboat: pictured is the Next 330 LX by Ranieri International.
“How can a 12-meter boat be a vessel?”
“If it is 11 meters it is not a vessel!”
Often under our articles, when we talk about XL boats, there are comments of this kind. Indeed, the “regulation” of this category of boat is an all-Italian peculiarity.
A watercraft, in fact, does not require registration. It all stems from the word “vessel” by which any boat whose hull length (mind you, not overall or waterline length) ranges from 0 to 10 meters is classified. For example, in the case of the Lancia Aprea 42 which we told you about at the last boat shows, we have probably unearthed the largest “boat” ever made that outwardly reaches 12.44 meters.
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The pivotal element, precisely, is hull length or approval length. How is it measured?
The official criteria on how to carry out this measurement are given in the Recreational Code, which in turn refers to the standard Uni En Iso 8666.
This is where hull length, often known as (“Lenght of the hull,” abbreviated to “Lh”), comes into play. It actually refers to the distance between the foremost and aftmost parts of the unit.
The measure includes all structural and integral parts of the boat, but excludes those that are removable-that is, that can be detached nondestructively without compromising the integrity of the hull.
For example, pulpits, boarding platforms, or others. In practice it is the length of the hull that includes everything structural and does not consider what can be disassembled.
In this specific case, then, how does Lancia Aprea 42, a good 12.44 m in length, manage to be a vessel? With a very special solution: in this case, the non-structural “piece” is … the entire extreme bow! As you can see from the photo, the actual hull ends at the bow perpendicular (the vertical passing through the waterline at the bow).
If you are in doubt, however, what the boat’s EU Declaration of Conformity states is always used to identify the “vessel.”
Beppe Boniventi
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