Sikorsky Aircraft Corp. and Lockheed Martin Corp. will compete jointly for the contract to replace the U.S. Air Force's fleet of combat search and rescue helicopters. The two companies signed a teaming agreement formalizing their intent to offer an advanced version of Sikorsky's UH-60M Black Hawk helicopter for the USAF's HH-60 Personnel Recovery Recapitalization program (HH-60 Recap). The agreement positions Sikorsky as prime contractor, with Lockheed Martin as the major subsystems supplier. The HH-60 Recap program seeks to replace the 112 existing HH-60G Pave Hawk helicopter fleet with an equal number of new aircraft requiring minimum airframe modification or mission systems development. The initial operational capability of eight aircraft—four trainers and four mission-ready aircraft, plus test aircraft—is expected in fiscal year 2015.