F/A-18 'Hornet' on display at the ND Centennial Air Show at the old Hector Airport terminal, Saturday 8/19/1989.
In 1992, the original Hughes AN/APG-65 radar was replaced with the Hughes AN/APG-73, a faster and more capable radar. A-model Hornets that have been upgraded to the AN/APG-73 are designated F/A-18A+ (wikipedia.com)