BS EN ISO 8666:2020 pdf download.Small craft — Principal data.
1 Scope This document establishes definitions of main dimensions and related data and of mass specifications and loading conditions. It applies to small craft having a length of the hull (L H ) of up to 24 m.
2 Normative references There are no normative references in this document.
For the purposes of this document, the following terms and definitions apply. NOTE For units, see Clause 4. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/
3.1 waterline WL intersection line of the water’s surface with the craft’s hull when the craft (3.15) is afloat
3.2 maximum load waterline reference waterline WL ref waterline (3.1) of the craft (3.15) when upright in the maximum loaded displacement (3.6)
3.3 sheerline intersection between deck and hull, for rounded deck edges the natural intersection, or, where no deck is fitted or the hull extends above the deck (bulwark), the upper edge of the craft's hull Note 1 to entry: The upper position of the sheerline depends on the inclination between the hull/deck intersection and the actual deck.
3.4 transom beam B T maximum width of the hull at the transom at or below the sheerline (3.3), excluding extensions, handles and fittings
Note 1 to entry: Where spray rails act as chines or part of the planing surface, they are included in the transom beam measurement.
Note 2 to entry: For craft (3.15) with a rounded or pointed stern or with a transom beam of less than half the maximum beam of the craft, the transom beam, B T , is the widest beam at or below the sheerline at the aft quarter length of the hull.
5 Measurements
5.1 General Measurements shall be established with the craft at rest at the maximum load waterline/reference waterline, WL ref , unless otherwise stated.
5.2 Longitudinal
5.2.1 General The lengths of a craft shall be measured parallel to the maximum load waterline/reference waterline and craft centreline as the distance between two vertical planes, perpendicular to the centreplane of the craft.
5.2.2 Maximum length, L max The maximum length (L max ) shall be measured in accordance with 5.2.1, one plane tangent through the foremost part and the other through the aftermost part of the craft. This length includes all structural and integral parts of the craft, such as stems or sterns, bulwarks, and hull/deck joints. This length includes parts which are normally fixed, such as fixed spars, bowsprits, pulpits at either end of the craft, stemhead fittings, rudders, outboard motor brackets, outdrives, waterjets, and any propulsion units extending beyond the transom, diving and boarding platforms, rubbing strakes, and permanent fenders. Outdrives, waterjets, other propulsion units, and all movable parts shall be measured in their normal operating condition to their maximum lengthwise extension when the craft is underway. This length excludes the following: — outboard motors; — any other type of equipment that can be detached without the use of tools. See Figure 1 for monohull measurements and Figure 2 for multihull measurements.BS EN ISO 8666 pdf download.