# VTBB A-CDM Guide for Pilots

### Preface

From AIRAC 2611 (29 OCT 2026), the (A-CDM) Airport Collaborative Decision Making system will be enforced at some ADs in the VTBB FIR. This guide informs pilots of the procedure for this new system.

<span style="white-space: pre-wrap;">This guide applies only to CDM ADs: </span>**VTBD, VTBS, VTCC, VTSG.**

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### Departure Procedure

##### STEP 1 ) Filing TOBT (Target off-block time)

By default, the A-CDM system takes your EOBT (Estimated off-block time) from your flight plan and automatically sets it as your TOBT. However, to reduce delay, YOU as a pilot are advised to always update TOBT directly on the VDGS Pane.

<p class="callout info">- The A-CDM VDGS Pilot pane can be accessed here**:**<span style="white-space: pre-wrap;"> </span>[https://vats.im/vdgs](https://vats.im/vdgs)<span style="white-space: pre-wrap;"> </span>  
  
[![image.png](https://wiki.vacc-tha.org/uploads/images/gallery/2026-10/scaled-1680-/EsofPVlkyBb5ZASe-image.png)](https://wiki.vacc-tha.org/uploads/images/gallery/2026-10/scaled-1680-/EsofPVlkyBb5ZASe-image.png)</p>

##### STEP 2 ) Be ready at your TOBT.

<span style="white-space: pre-wrap;">When you reach your TOBT, make sure you are fully ready for startup or pushback. </span>

##### STEP 3 ) Request pushback at TSAT.

<span style="white-space: pre-wrap;">You can request pushback/startup from 5 minutes before your designated TSAT (Target startup approval time) and within 5 minutes of that time. </span>

<p class="callout warning">If you fail to request pushback within 5 minutes after your TSAT, you will be delayed and must rejoin the queue.</p>

### Finding out more

<span style="white-space: pre-wrap;">You can find out more information on the CDM system for pilots at </span>[https://viffsys.com/docs.html](https://viffsys.com/docs.html).

[![image.png](https://wiki.vacc-tha.org/uploads/images/gallery/2026-10/scaled-1680-/Z4FtrgvFujV5kFTz-image.png)](https://wiki.vacc-tha.org/uploads/images/gallery/2026-10/Z4FtrgvFujV5kFTz-image.png)---

### Closing remarks

If you do not understand any instructions on frequency, please do not hesitate to ask for clarification! Our controllers are here to assist you.

You can submit any constructive feedback (positive or negative) for our controllers on this page.