本国际标准规定了船用小型耐候钢舱口的主要尺寸、位置和配件数量、材料和制造质量，以确保舱口的互换性。其余尺寸由制造商决定。舱口适合装载操作，并允许进入储物舱和干货舱。 舱口不适合作为进入任何类型储罐的通道，不得用作逃生舱口。 这些舱口通常符合1966年国际载重线公约（LLC66）的要求。必须针对每种情况考虑在位置1和位置2使用的可能性，必要时，舱盖应配备额外的加强件。 注:本国际标准的使用者应注意，在遵守本标准要求的同时，他们应确保遵守适用于相关船舶的法定要求、规则和条例。

This International Standard specifies the main dimensions, location and number of fittings, materials and quality of manufacture for small weathertight steel hatches for application on board ships in order to ensure interchangeability of the hatches. The remaining dimensions are left to the manufacturer. The hatches are suitable for loading operations and for giving access to storage compartments and dry cargo holds. The hatches are not suitable as an access to any kind of tanks and shall not be used as escape hatches. These hatches generally conform to the requirements of the International Convention on Load Lines 1966 (LLC66). The possibility for application in position 1 and position 2 has to be considered for each situation and, where necessary, the hatch covers shall be provided with additional stiffening. NOTE — Users of this International Standard should note that while observing the requirements of this standard, they should, at the same time, ensure compliance with such statutory requirements, rules and regulations as may be applicable to the individual ship concerned.