Dispatchers or Operators must not advise which information on the radio?

Dispatchers or Operators must not advise which information on the radio?

• A. Engine number
• B. Aspect, Name, or Indication of any fixed signal
• C. Marker display
• D. Interlocking speed

Answer: (B)

The essential rule here is that signal indications must come from the track and be observed by the crew, not relayed over the radio. Dispatchers or operators are not to tell the engineer what a fixed signal is showing—the aspect, name, or indication of any fixed signal—because relying on radio information for signal status can lead to miscommunication or outdated guidance, compromising safety. The engineer must depend on the actual signal indications and obey them. Other items like engine number, marker display, or interlocking speed pertain to identifying equipment or non-signal operational data, and while they may be communicated, they do not convey the current signal status. That’s why the instruction about not advising fixed-signal aspects is the correct one.

The essential rule here is that signal indications must come from the track and be observed by the crew, not relayed over the radio. Dispatchers or operators are not to tell the engineer what a fixed signal is showing—the aspect, name, or indication of any fixed signal—because relying on radio information for signal status can lead to miscommunication or outdated guidance, compromising safety. The engineer must depend on the actual signal indications and obey them.

Other items like engine number, marker display, or interlocking speed pertain to identifying equipment or non-signal operational data, and while they may be communicated, they do not convey the current signal status. That’s why the instruction about not advising fixed-signal aspects is the correct one.