The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of pressure altimeters, identified by NSN 7R-6610-016790961-QF, with a quantity of 7 units required. This procurement is critical as the item is flight essential, necessitating government source approval prior to contract award, which limits competition to previously approved sources only. Interested vendors must submit detailed technical data and documentation as outlined in the NAVSUP Source Approval Information Brochures, with a deadline for proposals set at 45 days from the notice publication date. For inquiries, potential bidders can contact Jacob A. Tarini at (215) 697-3563 or via email at jacob.tarlini@navy.mil.