ISO 12215-8:2009给出了根据ISO 8666测量的、安装在船体长度不超过24 m的小艇上的舵的尺寸要求。它只适用于单壳船。 ISO 12215-8:2009没有给出正确转向能力所需的舵特性要求。 ISO 12215-8:2009仅考虑因船舶操纵而对舵施加的压力载荷。在相关情况下，由接地或停靠引起的舵或其尾鳍（如已安装）上的载荷超出范围，需要单独考虑。 源自ISO 12215-8:2009的尺寸主要适用于休闲船，包括包租船。

ISO 12215-8:2009 gives requirements on the scantlings of rudders fitted to small craft with a length of hull of up to 24 m, measured according to ISO 8666. It applies only to monohulls. ISO 12215-8:2009 does not give requirements on rudder characteristics required for proper steering capabilities. ISO 12215-8:2009 only considers pressure loads on the rudder due to craft manoeuvring. Loads on the rudder or its skeg, where fitted, induced by grounding or docking, where relevant, are out of scope and need to be considered separately. Scantlings derived from ISO 12215-8:2009 are primarily intended to apply to recreational craft including charter craft.