# Expanded CDM Procedures (TWR/GND/DEL) ## Starting CDM (All Controllers) As the first thing when you log on you must activate CDM to use it

Write **.cdm master EKCH** to activate!

[![image.png](https://wiki.vatsim-scandinavia.org/uploads/images/gallery/2025-12/scaled-1680-/Hwtimage.png)](https://wiki.vatsim-scandinavia.org/uploads/images/gallery/2025-12/Hwtimage.png) ## How to do controller change correctly 1. The Old controller changes to Slave with command .cdm slave EKCH 2. Once there are no master controllers, the new controlles gets the master "role" by writing .cdm master EKCH ## Expanded CDM Procedures (TWR/GND/DEL)

This is both conducting ATFCM via CTOTs and A-CDM through use of TSATs

Expanded CDM procedures are done from Startup list, but can be done via departure list for TWR. Please know that: - You **should** adhere to A-CDM procedures unless traffic load is low, either through Departure list or Startup list. - You **MUST** adhere to displayed CTOT for takeoff ### Reference Material

Press on the top of the TSAT column where it says TSAT! This orders the departure list after TSATs and makes it easier to manage

With expanded mode there is a lot more information, but procedures are very similar

[![image.png](https://wiki.vatsim-scandinavia.org/uploads/images/gallery/2025-12/scaled-1680-/A6vimage.png)](https://wiki.vatsim-scandinavia.org/uploads/images/gallery/2025-12/A6vimage.png) #### Descriptor There are four main descriptor of times (EOBT, TOBT, TSAT, CTOT), separated by three descriptors (E, TTG, CONF), and an additional four additional items (ASRT, ASAT, DE-ICE, ECFMP). - **EOBT**: Estimated Off Block Time - The pilot filed off block time from the flightplan (e.g. Simbrief). The one passengers shows up for. - **TOBT**: Target Off Block Time. - The pilot filed off block time, via our CDM tool to confirm actual time of start-up readiness. - **TSAT**: Target Start-up Approval Time. - The time our system calculates based off the TOBT, to have the pilot fit into the sequence. - For internal capacity mainly - **CTOT**: Calculated Takeoff Time - A Takeoff time at which the aircraft must depart within -5/+10 min of. TSAT is adjusted accordingly. - For external capacity (ECFMP, ATFCM)
**(Color) Coding** **EOBT** **TOBT** **TSAT** **CTOT**
LIGHT GREEN -- Valid, but not yet Active --
DARK GREEN -- Active By CDM Server\*
YELLOW -- TOBT+4 TSAT+4 Default Color
RED Flight Suspended -- By CAD\*
ORANGE EOBT >5min from TOBT By Manual Event\*
WHITE Default color
\*Not important to know --- - **E**: A descriptor about the validity of the filed TOBT. - **TTG**: Time until the TSAT (- equals time to go, +equals past TSAT) - **CONF**: A descriptor if the TOBT has been confirmed ( or altered) by either "pilot" or "ATC" -
**(Color) Coding** **E** **TTG** **CONF**
DARK GREEN Correct (C) or Passed (P) -35min until +3 min Default Color
YELLOW -- +4min until +5 min TSAT+4
RED Invalid (I) --
--- - **ASRT**: Actual Start-up Request Time - The pilot requested start-up if done so before TSAT is active. - **ASAT**: Actual Start-up Approval Time - When start-up approved (STUP or PUSH in Status), ASAT activates and rest of line goes gray. - **DE-ICE**: De Icing assigned - De-ice is required for the pilot, hence taxi out time will be extended. - **ECFMP**: European Central Flow Management Position - A note on what is the origin of a particular flow measure. Only for information. ### Procedures Procedures depends on whether you are handling SEQ only or DEL+SEQ.
Aircraft calls for ATC Clearance (if within AOR) If **CTOT** is present: Advise pilot about CTOT!. Advise on earliest startup time (TSAT) If no **CTOT**: No further action required at this stage.
Aircraft calls for STARTUP/PUSHBACK Check your timings and note: - If TSAT is Dark Green, Start-up can be approved. - If TSAT is Light Green, Pilot is still more than 5 minutes early. he must wait. - If TSAT is Yellow Start-up can be approved, but be quick, it will soon expire. - If TSAT is Blank, Flightplan expired and new TOBT must be filed. If TSAT is Light Green or a CTOT is present or TOBT is Invalid (expired), try to improve it by sending a "Ready message" by \*right clicking on the TOBT. This updates the TOBT to current time, and tries to recalculate everything to look for an earlier time. If TSAT remains Light Green after that, Start-up cannot yet be approved. - Click ASRT to remind that a request has been made by the pilot - Approve Startup when TSAT turns Dark Green When start-up approved - Update Status to STUP or PUSH to activate ASAT, and blank out the rest of the times. Aircraft is released.
## Flow Chart

Right click on image and select "Open in new tab" to see picture in higher resolution

![](https://wiki.vatsim-scandinavia.org/uploads/images/gallery/2025-12/embedded-image-m4ogaltr.png)