Keywords: Lockheed PO-1W VX-4 NAS Pax.jpg Photo of the commissioning of the Lockheed PO-1W Warning Star by the U S Navy air development squadron VX-4 Vanguards at Naval Air Station Patuxent River Maryland USA circa 1949 In 1952 the PO-1W was redesignated WV-1 Note the smaller radome of the APS-20 radar below the fuselage compared to the production VW-2 after 1962 EC-121K U S Navy Naval Aviation News September 1951 http //www history navy mil/nan/backissues/1950s/1951/Sep51 pdf ca 1949 USN PD-USGov-Military-Navy Lockheed EC-121 Warning Star 1949 at Naval Air Station Patuxent River Air Test and Evaluation Squadron 4 United States Navy 1949 in Maryland 1949 photographs |