CDM Config File

This repository contains the configuration and settings files for the CDM plugin, and supports updating data without updating the sector.

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How CDM Works

CDM calculates the runway load using the pilot-submitted Target Off-block Time (TOBT) (or EOBT) and their estimated taxi time. It then issues a slot (TSAT or Target Start-up Approval Time) to the pilot based on the runway's defined capacity to avoid waiting or a long queue on the taxiway. CDM can also take flow control measures and pilot CTOT into account during large events.

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Abbreviations

• EOBT - Estimated Off-Block Time: The expected off-block time the pilot files in their flight plan (or Simbrief departure time).
• TOBT - Target Off-Block Time: The target off-block time submitted by the pilot in our ADGS system, indicating when they will be ready for pushback (or EOBT when TOBT is not available).
• ARDT - Actual Ready Time: The time that the pilot requests pushback. Activating ARDT will avoid flight plan invalidation at TOBT +5
• TSAT - Target Start-up Approval Time: The calculated time for the traffic to push back. The valid pushback window will be TSAT -5 to TSAT +5 minutes.
• SLOT - Time until offblock slot: Time remaining until the TSAT window. -8 means 8 minutes until TSAT.
• TTOT - Target Take Off Time: The calculated take-off slot for the pilot.
• CTOT - Calculated Take Off Time: The assigned take-off slot for the pilot, usually being issued during large events (e.g., CTL or CTP), or the system initiates action because of nearby airspace or an airport is overloaded

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Set Up:

1. Go to the Departure list and click "F."
2. Select the required columns:
   • For CDC, select TSAT, SLOT, ARDT.
3. The controller covering CDC uses the command .cdm master VHHH to activate the system or left-click VHHH on the CDM panel on Euroscope (Click once only and allow it to load for a while).

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Procedure:

CDC

1. Issue clearance, by the datalink method is suggested.
2. Keep the aircraft on your frequency and ask them to report ready. Pilot should report ready at their TOBT
3. When the traffic has reported ready, check the "SLOT" column on the departure list.
   • If the green colour ($-5$ to $+5$) is shown, left-click ARDT, then send the traffic to GMC.
   • If the yellow colour ($<-5$) is shown, left-click ARDT, then send the traffic to GMC when it becomes green (In TSAT window), you may use the phraseology (Callsign) expect push at time (time to TSAT in minutes, or basically the value in "SLOT", e.g. 45 for XX:45z), call you back
   • If no value is shown or "~" is displayed, use the phraseology (Callsign) Your TOBT is invalid, update it and report ready again, alias .tobt can be used.

• You are strongly advised to issue clearance via PDC to maintain radio capacity, use the phraseology (Callsign) Hong Kong Delivery ATC Clearance will be sent via data-link
• You may use STUP Ground status to indicate traffic that has been sent to the GMC freq.

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For Controller Change of the CDM Master Position

1. The previous "master" controller uses the command .cdm slave VHHH.
2. Then, the relief controller uses the command .cdm master VHHH.

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GMC

1. Check if the aircraft is within its TSAT window when requesting pushback/start-up.
2. If not, use the phraseology (Callsign) Your TOBT is invalid, update it and report ready again, alias .tobt can be used, and revert them to CDC freq.

Runway Direction Change

In case of a runway direction change:

1. AMC should decide the last departure aircraft by checking the TTOT, which is available in the Departure list (can be selected by clicking "F" on the departure list).
2. AMC can then process and pass the first available departure time for the new runway to CDC.
3. CDC uses the command .cdm departuredelay VHHH/(new departure runway) (first departure time in 4-digit UTC). E.g., .cdm departuredelay VHHH/07C 0700. (You have to do it separately if there are 2 departure runways.)

   Use time "9999" to cancel the previous input command in case of any mistakes.

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Ground Stop

In case a ground stop is required:

• CDC uses the command .cdm startupdelay VHHH/(affected runway) (4-digit time in UTC). (Use the same format as the runway direction change delay command.) OR
• FMP use Ground Stop flow measure in website dashboard