ISO 12215-9:2011定义了载荷，并规定了船体工程附件在船体长度达24 m的单船帆船上的尺寸，根据ISO 8666测量。它给出了设计应力，要评估的结构部件，龙骨，中心板及其附件的负载情况和设计负荷，计算方法和建模指导以及遵守其规定的手段

ISO 12215-9:2011 defines the loads and specifies the scantlings of sailing craft appendages on monohull sailing craft with a length of hull of up to 24 m, measured according to ISO 8666. It gives design stresses, the structural components to be assessed, load cases and design loads for keel, centreboard and their attachments, computational methods and modelling guidance, and the means for compliance with its provisions.