This document specifies general requirements, the materials and test methods for the buoyancy chamber of inflatable buoyancy support systems, which serve residual buoyancy for damaged ships not to sink or capsize, and which can be installed in machinery spaces and/or cargo holds.st edition 2019-12 Ships and marine technology — Inflatable buoyancy support systems against flooding of ships — Part 2: Buoyancy chamber Reference number ISO 23121-2:2019(E) ？ ISO 2019 ISO 23121-2:2019(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part