ISO 19901-1:2015对石油和天然气工业各类海上结构设计，建造和运行情况的气象和海洋（海洋）条件的确定和使用提出了一般要求。 要求分为两大类: - 与一般环境条件的确定有关，以及充分描述它们所需的metocean参数; - 与海洋参数的设计，施工活动或离岸结构的运行有关的特征和使用。 讨论的环境条件和metocean参数是: - 具有比结构设计使用寿命长得多的给定返回周期的metocean参数的极端和异常值， - 以海洋参数的累积，有条件，边际或联合统计的形式长期分配metocean参数，以及 - 在结构的设计使用寿命期间预期频繁发生的正常环境条件。 Metocean参数适用于: - 确定新结构设计的行动， - 确定exi的评估行动

ISO 19901-1:2015 gives general requirements for the determination and use of meteorological and oceanographic (metocean) conditions for the design, construction and operation of offshore structures of all types used in the petroleum and natural gas industries. The requirements are divided into two broad types: - those that relate to the determination of environmental conditions in general, together with the metocean parameters that are required to adequately describe them; - those that relate to the characterization and use of metocean parameters for the design, the construction activities or the operation of offshore structures. The environmental conditions and metocean parameters discussed are: - extreme and abnormal values of metocean parameters that recur with given return periods that are considerably longer than the design service life of the structure, - long-term distributions of metocean parameters, in the form of cumulative, conditional, marginal or joint statistics of metocean parameters, and - normal environmental conditions that are expected to occur frequently during the design service life of the structure. Metocean parameters are applicable to: - the determination of actions for the design of new structures, - the determination of actions for the assessment of existing structures, - the site-specific assessment of mobile offshore units, - the determination of limiting environmental conditions, weather windows, actions and action effects for pre-service and post-service situations (i.e. fabrication, transportation and installation or decommissioning and removal of a structure), and - the operation of the platform, where appropriate. NOTE Specific metocean requirements for site-specific assessment of jack-ups are contained in ISO 19905‑1, for arctic offshore structures in ISO 19906 and for topside structures in ISO 19901‑3.