BAE Systems San Diego Ship Repair, San Diego, California (N00024-16-D-4419); Huntington Ingalls Industries Inc., San Diego, California (N00024-16-D-4420); and General Dynamics, National Steel and Shipbuilding Co., San Diego, California (N00024-16-D-4421), are each awarded firm-fixed-price modifications to exercise Option Period Three under previously-awarded indefinite-delivery/indefinite-quantity multiple-award contracts for complex, emergent and continuous maintenance and Chief of Naval Operations availabilities on amphibious ships. Each company will have the opportunity to provide offers for individual delivery orders during Option Period Three, with an estimated cumulative combined value of $406,853,897. Work will be performed in San Diego, California, and is expected to be complete by March 2020. No funding will be obligated at time of award. Funding will be provided as individual delivery orders are issued.  The Southwest Regional Maintenance Center, San Diego, California, is the contracting activity.