A U.S. Navy Boeing PB-1W Fortress (BuNo 77138) from early warning squadron VW-1 in-flight near Hawaii (USA), in January 1954. Under a program known as Cadillac II, the U.S. Navy fitted the APS-20 radar system onto the B-17G aircraft, giving it the designation PB-1W.
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== Summary == {{Information |Description=Under a program known as '''Cadillac II''', the U.S. Navy fitted the APS-20 radar system onto the B-17G aircraft, giving it the designation PB-1W. |Source=http://www.emanszone.com/ASSETS/vw1pb1.jpg |Date=c. 1944 |A
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