The B-52 radarscope consists of an illuminated bearing ring and 10-inch diameter tube face called a Plan Position Indicator (PPI). The chronometer, data plate, and counter to the right are superimposed via a separate optical path. The time on the twenty-four clock is 090617Z (4:06:17 CDT). Below it, the handwritten data plate identifies locations in the flight plan (Bismarck and St. George); the date (24 Oct. 68); aircraft identification (B-52H 012); radar system designation (ASQ-38); and names of the operators (Richey and McCaslin). The counter identifies the frame as #772. The B-52 is the bright spot in the center of the radarscope, on a heading of 122 degrees (0 degrees is north). The UFO echo appears at 242 degrees azimuth, 1.05 nautical miles (nmi) aft of the right wing of the B-52. The black circle in the center is the “TR hole” (transmit/receive) or “altitude hole,” and the white annulus extending five nmi out to the edge of the bearing ring is radar ground return. The diameter of the altitude hole decreases as the B-52 descends in altitude. There are three inner range rings visible within the altitude hole corresponding to .75, 1.25, and 1.75 nmi. The radial line at 284 degrees is the point where the next frame advances in the camera to begin another three-second time exposure, corresponding to the clockwise rotation of the radar antenna mounted beneath the nose of the B-52. The marker at 132 degrees is a manually adjusted azimuth marker.