What must the recertification PSOB include?

The recertification PSOB, or Pre-Submarine Operations Book, must include a record of any system alterations conducted since the last certification. This is essential because maintaining accurate documentation of alterations ensures that all changes to the Diver Life Support System are tracked and assessed for safety and compliance with operational standards. Such records help identify any modifications that could impact the performance or safety of the diving system, thereby facilitating effective maintenance and risk management.

Including this information supports adherence to regulatory requirements and operational protocols, ensuring that divers are aware of any changes that could affect their safety or the functionality of the Life Support System. It keeps all personnel informed, thereby preventing potential issues that could arise from undocumented modifications.

While the other options present valuable information relevant to the overall operation and management of diving systems, they do not specifically focus on the necessary updates related to system changes, which are crucial for ensuring ongoing safety and operational integrity.