What is the main focus during a secondary investigation by a Repair Party Investigator?

The main focus during a secondary investigation by a Repair Party Investigator is to complete a more thorough investigation and look for unseen damage. This stage of investigation is critical because, after addressing immediate threats from an incident, it's essential to ensure that there are no hidden issues that could lead to further complications. Secondary investigations allow the investigator to delve deeper into the damage that may not have been immediately apparent during the initial assessment.

The goal is to ensure the overall safety and readiness of the vessel, as unnoticed damage can compromise structural integrity or overall operational effectiveness. Therefore, this thorough investigation is vital in preventing potential future incidents and ensuring that any necessary repairs can be made promptly.

The other options, while important in their own contexts, do not capture the specific purpose of a secondary investigation, which centers on uncovering further damage to maintain the safety and efficiency of operations.