This synopsis notice announces the government's intent to modify an existing Basic Ordering Agreement (BOA) for the repair of Navy weapon system support equipment by adding five specific National Item Identification Numbers (NIINs). The work involves furnishing labor, material, and facilities to repair and/or modify these items, with performance specified for the NAVSUP Weapon Systems Support office in Philadelphia. The government intends to award this modification non-competitively to a single pre-approved source, MATHTECH, INC., citing a lack of necessary technical data to compete the repairs. While this is a notice of intent and not a formal competitive request, the government will consider capability statements from other responsible sources if submitted within a short, specified period after the notice's publication. Source approval is mandatory, and proposals from unapproved sources must include a complete source approval application package.