Hourglass Effect, SPOKING, and SECTORING are listed topics. Which option is NOT a listed topic?

• A. Hourglass Effect
• B. SPOKING
• C. SECTORING
• D. Auto Tune

Answer: (D)

The question is checking which terms are part of the listed RO topics. The three topics you should recognize as listed are the Hourglass Effect, Spoking, and Sectoring. The Hourglass Effect describes how certain scanning geometry can produce a narrowed, then widened, pattern on the display, like an hourglass, signaling a geometry-related limitation in detection. Spoking refers to a display artifact where radial lines appear from the center outward due to how bearing updates or plotting are handled, creating spoke-like patterns. Sectoring is the practice of dividing radar coverage into distinct sectors to manage search patterns and processing resources effectively. Auto Tune, while a radar feature in some systems, is not among the listed RO topics, so it is the item that does not fit.