This part of EN 12079 specifies requirements for the design, manufacture 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.
This part of EN 12079 specifies only transport related requirements.
Other parts of the standard are:
EN 12079-2, Offshore containers and associated lifting sets - Part 2: Lifting sets Design, manufacture and marking
EN 12079-3, Offshore containers and associated lifting sets - Part 3: Periodic inspection, examination and testing