This standard specifies transport related requirements for the design, construction and marking of offshore freight and service containers with maximum gross mass not exceeding 25000 kg, intended for repeated use to, from and between offshore installations and ships. It establishes a system for plating of offshore containers, linked to a defined scheme for periodic examination and test and introduces a requirement for pre-trip inspection of offshore containers. Guidance as to the knowledge and experience, required by those responsible for carrying out inspections in relation to the system of periodic inspections specified in this standard, is given in annex A. Requirements for the lifting set and for non-transport related requirements, relating to offshore service containers, e.g. requirements for installation and use, are outside the scope of the standard.