To whom should suspicious activity be reported?

The correct choice is to report suspicious activity to the Ship/Vessel Security Officer. This is due to the role of the Ship/Vessel Security Officer, who is specifically trained and designated to oversee security protocols and respond to security-related incidents on the vessel. By reporting to the Ship/Vessel Security Officer, the crew ensures that any suspicious activity is assessed by someone with the authority and expertise to manage the situation appropriately. The Officer can then coordinate further actions such as contacting law enforcement or national authorities if needed, ensuring a proper response protocol is followed.

In contrast, while the onboard captain is crucial for overall vessel management, the Ship/Vessel Security Officer is the designated point of contact for security-related concerns. Local law enforcement and national authorities are important for various security and legal matters but generally become involved only when an incident escalates beyond the onboard response capability. Thus, for immediate and effective handling of suspicious activities on the vessel, the reporting should go directly to the Ship/Vessel Security Officer.