Who may accompany the boarding team during a basic or extended ISI?

The correct answer highlights the protocol that allows the vessel master or their designee to accompany the boarding team during a basic or extended Interagency Security Inspection (ISI). This inclusion is essential for several reasons.

First, the presence of the vessel master or a designated representative fosters communication between the boarding team and the vessel. This can enhance the efficiency of the inspection process, as the master can provide critical information about the vessel's operations, documentation, and specific security measures in place.

Second, allowing the master or their designee to be present ensures that there is accountability on the vessel's part during the inspection. It enables the boarding team to ask questions and clarify any concerns directly with someone knowledgeable about the vessel's operations.

The other answer choices either restrict attendance inappropriately or focus on individuals who do not have the necessary knowledge and authority to interact with the boarding team effectively. Only the boarding officer lacks the context to provide vital information during the inspection, and limiting it to just the owner could prevent operational flows since they may not be onboard during the inspection. Denying everyone the chance to accompany the boarding team would undermine the collaborative nature of maritime operations and inspections, leading to less effective oversight.