When issuing verbal or written authorities, the dispatcher must use only the time OKd on which display?

• A. CAD Screen Display
• B. Local Clock
• C. Railroad Timetable
• D. Dispatcher Memory

Answer: (A)

Rely on a single, real-time reference from the dispatch system to time authorities. The CAD screen display provides the synchronized clock that governs when an authority becomes valid and when it expires, so everyone references the same moment. A local clock can drift over time, leading to mismatches; a railroad timetable is just a published schedule and doesn’t reflect the live authorization time; and relying on memory introduces human error. Therefore the CAD screen display is the authoritative source for the time OKd when issuing verbal or written authorities.