What designates specific ports as strategic seaports of embarkation?

The designation of specific ports as strategic seaports of embarkation is determined through collaboration between the U.S. Army's Surface Deployment and Distribution Command (SDDC) and the Maritime Administration. This organization, along with the Maritime Administration, assesses logistical capabilities, security measures, and the overall suitability of ports for military and commercial transportation, ensuring that they meet the necessary criteria for strategic importance.

Strategic seaports play a vital role in enabling the rapid deployment of military forces, equipment, and supplies, particularly in times of crises or during military operations. The collaboration between the SDDC and Maritime Administration ensures that there is an alignment of resources and planning, making it effective for national defense needs.

Other options, while related to port operations and security, do not specifically pertain to the formal designation process of strategic seaports. Maritime security guidelines under international law establish broad principles for safe navigation and port security but do not designate individual ports. Approval from the Department of Homeland Security primarily involves security measures rather than the specific designation process. Local state governments may influence operational decisions at ports but lack the authority to designate them as strategic seaports without the collaboration and assessment from federal entities like the SDDC and the Maritime Administration.