The Naval Sea Systems Command intends to negotiate a Basic Ordering Agreement (BOA) with Huntington Ingalls Incorporated, Ingalls Shipbuilding (Ingalls), 1000 Access Road, Pascagoula, MS 39568, for the accomplishment of PSA Planning and Support Services; as well as, Emergent Availabilities on DDG 51 Class Destroyers (DDGs 123, 125, and 128) built by Ingalls.  Orders will be negotiated on a sole source basis with Ingalls for PSA Planning, pursuant to the authority granted by 10 U.S.C. 2304(c)(1). Contemplated orders will encompass advance planning, engineering support, on-site engineering liaison, and ordering and processing required material in support of PSAs and emergent repairs.  Individual orders placed under the BOA shall be synopsized, when required, in accordance with applicable requirements.  Firms seeking subcontracting opportunities should contact the above mentioned shipbuilder.