Which MARSEC level includes law enforcement ashore?

• A. MARSEC I
• B. MARSEC II
• C. MARSEC IV
• D. MARSEC III

Answer: (D)

MARSEC levels define how security is increased across ships and port facilities. At the normal level, standard security measures are in place. When risk rises, security is heightened, with more screening and tighter controls around the vessel and the facility. The highest standard level calls for extraordinary security measures and, crucially, brings in law enforcement ashore to support access control, patrols, and rapid response through coordination with port police and other agencies. That integration of law enforcement ashore is what distinguishes this level from the others, which focus more on onboard or immediate port-area measures. The nonstandard choice isn’t part of the usual ISPS MARSEC framework, so it doesn’t apply here.