Who is responsible for issuing MARSEC directives?

The individual responsible for issuing MARSEC (Maritime Security) directives is the Commandant of the Coast Guard or a delegee. These directives are critical as they provide guidance and instructions regarding the security measures necessary to protect maritime interests from threats and vulnerabilities. The issuance of these directives falls under the authority of the Commandant because they oversee the operations and regulatory framework concerning maritime security.

This role is crucial in establishing the required security levels at various facilities and ensuring compliance with national security measures. The responsibility is centralized to maintain consistency and effectiveness across the maritime domain, making the Commandant or their designated representative the correct authority for this action.

In contrast, while the Facility Security Officer plays a vital role in implementing security measures at specific facilities, they do not have the authority to issue MARSEC directives. The Coast Guard Captain oversees operations at their respective area but also does not have the authority to issue broad MARSEC directives. The Secretary of Transportation deals with transportation policy and infrastructure, but the specific issuance of MARSEC directives is the purview of the Coast Guard's command structure.