U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
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For each Maritime Security (MARSEC) Level, the vessel owner or operator must ensure the Vessel Security Officer (VSO) and vessel security personnel are able to:
(a) Respond to security threats or breaches of security and maintain critical vessel and vessel-to-facility interface operations, to include:
(1) Prohibiting entry into affected area;
(2) Denying access to the vessel, except to those responding to the emergency;
(3) Implementing MARSEC Level 3 security measures throughout the vessel;
(4) Stopping cargo-handling operations; and
(5) Notifying shoreside authorities or other vessels of the emergency;
(b) Evacuating the vessel in case of security threats or breaches of security;
(c) Reporting security incidents as required in § 101.305;
(d) Briefing all vessel personnel on possible threats and the need for vigilance, soliciting their assistance in reporting suspicious persons, objects, or activities; and
(e) Securing non-critical operations in order to focus response on critical operations.