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NAVSEA 21

Program Summary



As NAVSEA’s Director for Surface Ship Maintenance, Modernization and Sustainment, SEA 21 is the dedicated life cycle management organization for the Navy's in-service surface ships and is responsible for managing critical modernization, maintenance, training and inactivation programs. SEA 21 provides wholeness to the Fleet by serving as the primary technical interface, ensuring surface ships are modernized with the latest technologies and remain mission relevant throughout each ship's service life. The organization also maintains inactive ships for future disposal, donation, or transfer, to include follow-on technical support to our partner navies.

Mission
SEA 21 integrates maintenance strategies, modernization plans, training needs, and technical, logistics, and programmatic efforts to best manage the lifecycle of U.S. and partner Navy surface ships and systems from fleet introduction through transfer or disposal.

Vision
SEA 21 is the U.S. Navy's leader in delivering critical Fleet support to ensure surface ships meet all current and future mission requirements.

SEA 21 is comprised of six program offices and directorates as well as the Surface Ship Maintenance Engineering Planning and Procurement Activity (SURFMEPP):

PMS 321 – Unmanned Small Combatants & Amphibious Ships

PMS 326 – International Fleet Support

PMS 339 – Surface Training Systems Program Office

PMS 421 – Large Surface Combatant Modernization & Sustainment 

PMS 443 – Bridge Integration/HM&E Sustainment

PMS 451 - Destroyer Modernization 2.0

SEA 21I – Inactive Ships Directorate

SURFMEPP – Surface Ship Maintenance Engineering Planning Program
 

Updated July 2024