The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of 36 hoisting units, identified by NSN 7R-1680-016799708-V2 and REF NR 44312-12. The acquisition is restricted to approved sources due to the flight-critical nature of the item and the lack of adequate technical data for alternative suppliers, necessitating government source approval prior to contract award. Interested parties must submit their proposals along with the required source approval documentation within 45 days of this presolicitation notice, with all inquiries directed to Alyssa T. Thieu at alyssa.thieu@navy.mil or by phone at (215) 697-0169.