The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support Mechanicsburg, is soliciting proposals for the repair and modification of Receiver-Transmitter units. The procurement aims to ensure the operational readiness of radar equipment, which is critical for various defense applications, by establishing a Repair Turnaround Time (RTAT) of 260 days for the repaired units. Interested contractors must provide a firm-fixed-price quote that includes the repair price, total price, and their capacity constraints if unable to meet the RTAT. Proposals should be submitted via NECO or email to the primary contact, Adrienne L. Rubinic, at ADRIENNE.L.RUBINIC.CIV@US.NAVY.MIL, with a validity period of three months from the submission date.