When must the Dispatcher be promptly notified by the crew regarding entering DCS territory?

When must the Dispatcher be promptly notified by the crew regarding entering DCS territory?

• A. Left DCS territory.
• B. Entered DCS territory, except when entering at an interlocking, controlled point, or TBS.
• C. After clearing the limits of their authority.
• D. Only at interlocking positions.

Answer: (B)

Prompt notification is required when a crew enters territory under the dispatcher's control, so the dispatcher knows your exact position and can coordinate with other traffic. This keeps centralized control informed during movement. The rule provides a clear exception: if you are entering at an interlocking, a controlled point, or a Temporary Blocking System (TBS), the signaling and protection at that location are already managing entry, so separate notification to the dispatcher isn’t required. The other ideas— notifying only after leaving the territory, or only at interlockings—don’t fit because the standard practice is to alert on entry, with the listed locations as the specific exceptions where extra notification isn’t necessary.

Prompt notification is required when a crew enters territory under the dispatcher's control, so the dispatcher knows your exact position and can coordinate with other traffic. This keeps centralized control informed during movement. The rule provides a clear exception: if you are entering at an interlocking, a controlled point, or a Temporary Blocking System (TBS), the signaling and protection at that location are already managing entry, so separate notification to the dispatcher isn’t required. The other ideas— notifying only after leaving the territory, or only at interlockings—don’t fit because the standard practice is to alert on entry, with the listed locations as the specific exceptions where extra notification isn’t necessary.