The Naval Sea Systems Command (NAVSEA) intends to award a modification to contract N00024-18-C-2404 to National Steel and Shipbuilding Company (NASSCO), San Diego, California on a sole source basis for procurement of additional Post Shakedown Availability (PSA) efforts including: all manpower, support services, material, and associated technical data and documents required to prepare for and accomplish the LHA 7 (TRIPOLI) availability. The anticipated contract action will include one (1) cost-plus-award-fee contract line item for procurement of services for up to 6 months.