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A request for proposal (RFP) was issued in July 1986, and two contractor teams, Lockheed, Boeing and General Dynamics, along with Northrop and McDonnell Douglas, were selected on 31 October 1986 to undertake a 50-month demonstration phase, culminating in the flight test of two prototypes, the YF-22 and the YF-23.
The federal government's procurement agency, the Department of Public Works, placed a Request for Proposal in 1988 to Canadian shipbuilders for construction of 12 MCDVs.