Which of the following describes the function of a "Ship Rider"?

The function of a "Ship Rider" is specifically to board foreign vessels as part of operations aimed at combating drug trafficking and other illegal activities at sea. Ship Riders are typically law enforcement officers who have the authority to embark on vessels from other nations, which enables them to enforce laws against smuggling and other illicit activities. This role is crucial for international cooperation in maritime security, allowing for cross-border collaboration in addressing crime that often transcends national boundaries.

The other options, while related to maritime operations, do not accurately describe the primary function of a Ship Rider. Oversight of maritime safety compliance pertains more to roles focused on regulatory enforcement rather than direct intervention against criminal activities. Military members serving on commercial ships are typically involved in training or operational support, but this does not align with the specific mission of disrupting drug trafficking. Navigating international waters is a general skill set for various maritime crew members, but it does not reflect the unique responsibilities of a Ship Rider. Thus, the correct identification of Ship Riders as officers focused on drug interdiction underscores their essential role in enhancing maritime law enforcement efforts.