AMAN (MAESTRO)

1. Background information

The issue and its solution:

Aircraft enter the TMA at several FFs (feeder fixes, the waypoint where the STAR begins). For landing, all aircraft must be sequenced. Here, the problem is building the optimal sequence of aircraft as there are several constraints involved (e.g. wake turbulence, runway specific rates depending on high speed exits, departure gaps). AMAN can calculate this sequence and display it to the controllers, which in turn can act on it when deciding who is allowed inbound without (further) delays, or if holding, who may leave the hold and when.

An arrival manager (or AMAN) works as follows:

2. Introduction

Note: The MAESTRO plugin is WIP and may contain bugs, if you think you have found one, let the developer know via the VATSCA Forums.

2.1 Implementation (and limitations) on VATSIM:

The MAESTRO plugin emulates the AMAN tool with the same name, developed by Egis-Avia (now Thales), in use at EFHK, EKCH, ESSA among others. Its functionality is limited compared to the real systems, however it can be useful in helping virtual controllers monitor and manage inbound flows and delays to one or more airports.

The calculations are based on the predictions provided by EuroScope and its programmed data, so to get useable results, it is important to keep the aircrafts’ data updated. The most common problems are:

Note:The plugin can only be used for one airport group at a time. (If you select ESSA, also traffic to ESSB will be shown)

2.2 Interpreting and acting on generated data:

Example:


Note: For actual operational procedures with AMAN in use: see 3.6

2.3 Timeline and Glossary

3. Plugin usage and procedures

Some information is excluded or simplified for ease of understanding and use, for more detailed information on the inner workings of the plugin, see the included manual in the .zip package.

3.1 Plugin installation

MAESTRO

The Swedish GNG package contains the latest beta version of the MAESTRO plugin by Juha Holopainen.

TopSky

The Swedish GNG package contains a version of TopSky that automatically receives MAESTRO data for ESSA/ESSB and EKCH when updated data is available.

3.2 Operation modes

3.2.1 Standalone mode

The plugin calculates its own data (can be useful for testing the plugin for the first time, not sharing any sequence data)
This mode can also be selected to disconnect from other previously selected modes.

3.2.2 MASTER mode

The plugin calculates its own data, and shares it as follows:

3.2.3 SLAVE mode

The plugin receives its data from an outside location depending on the settings:

Note: TopSky automatically receives MAESTRO data from the server to show in aircraft labels and traffic management lists without the need to connect in MAESTRO.

You only need to connect via MAESTRO if you want to view the data on the MAESTRO timeline.

Note: All three AMAN operation modes work regardless if you are connected as an active controller or OBS.

The relevant operation modes for live operation on VATSIM are:
• MASTER (Web+Local)
• SLAVE (Web+Local)
The persistent use of (Web+Local) should allow the planned sequence to be kept if MASTER is changed (see 3.8).

When using several instances of EuroScope, the secondary instances are to be connected as:
SLAVE (Local)


3.3 General Operation

The COTS and AMAN windows can be moved by dragging them from the title bar. Other windows are non-moveable.


3.3.1 The AMAN Window:

  1. The current airport (left-click to open the Setup Window)
  2. The runway rates (left-click to open the Change Rates Window)
  3. The measured actual rates during the past 30 minutes and deviation from set values
  4. The sequence in numbers: aircraft past the FF (TMA), and the total number of aircraft (TOT)
  5. The current operation mode, empty for standalone mode. (MASTER/SLAVE, the SI of the controller, local/web/web+local)
  6. The UTC time when the data was last refreshed
  7. Opens a menu to scroll between the FFs when in ACC and FLOW view mode, including an option to toggle visibility of the panels marked in red (1-6)
  8. Changing between the three view modes: (See 3.3.2)
  9. The “Desequenced” button displays the number of De-sequenced flights, (left-click to open the De-sequenced List).
  10. Current UTC time (left-click to open the Labels Window, changing what is displayed in the flight label)
  11. Scrollbar (Can be moved by dragging the bar itself, or by clicking on the background area next to the bar. Left-clicking changes the setting by one unit, right-clicking by 10 units, double-click to resume to default view)
  12. The flight label, from left to right (left-clict to open callsign menu)
           • Current delay (Color depending on how long the delay is)
           • Aircraft callsign (Color depending on flight state)
           • STA RWY or FF depending on view mode
             (When in holding: the time in which the FF shall be passed, inbound TMA.)
  13. The timeline, upwards on the scale indicates the future. defaulting to show current time at bottom. As time progresses, the scale automatically moves from top to bottom (To scroll, see 10.).

3.3.2 The view modes:
View Mode Timelines A/C Position on Timeline
Runway One for each active arrival runway RWY STA
FLOW One for each pre-defined feeder fix group
One for flights not routing via any of the defined feeders
ACC (Feeder) FF STA

Note: The ACC view is new since v1.1b3, it shows FF STA on the timeline instead of RWY STA.


3.3.3 The Flight Information Window:

The Flight Information Window can be opened from the callsign menu (see 3.3.1 -> 12), it displays flight related data. as follows:


3.3.4 The De-sequenced List:

The “De-sequenced” can be opened from the main AMAN window (see 3.3.1 -> 9), it contains flights temporarily removed from the sequence. They are presented in the same order as they were entered into the list. Left-clicking one or more callsigns highlights them. The “Resume” and “Remove” buttons can then be used to either re-enter the highlighted aircraft back into the sequence or remove them from it permanently.


3.3.5 The TopSky track label:

Note: TopSky automatically receives MAESTRO data from the server to show in aircraft labels.

When AMAN is active for an airport, for arrivals having a predicted sequencing, the current delay is displayed in line 0 of the track label in minutes, with one of the following prefixes:


3.3.6 The Traffic Management Lists

Note: TopSky automatically receives MAESTRO data from the server to show in the TMLs.

See TopSky Profile - Traffic Management List 1 & 2 to see the data fields showing AMAN/MAESTRO data.


3.4 Flight states (and their colors)

Flight labels are color-coded according to their states which are based on the time from the airport and the feeder fix, except for the delay items whose coloring depends on the amount of delay,

Note: An aircraft disconnecting will always initiate a resequencing by the plugin.

Note: A flight still in UNSTABLE state can not be manually manipulated until it is turns STABLE.


3.5 Interacting with flight labels and the timeline

Terminology:

If managing a runway change using AMAN, it is recommended to set the planned arrival runway manually for each aircraft (to prevent problems when changing the runway set as active for arrivals in EuroScope)


3.5.1 Callsign menu

Left-clicking on a flight label opens the callsign menu with the following options:

Note: Recomputing or moving a flight may become necessary when it is no longer in the unstable state (so its position in the sequence is fixed) and can no longer meet its calculated time profile, starting to delay all the flights behind it in the sequence.

Note: Disconnected flights will stay in the sequence for 10 minutes unless manually removed
(If a flight that is still online is removed from the sequence, it will be automatically added again).

3.5.2 Timeline menu

Left-clicking a timeline opens a menu with the following options:

3.5.3 Manually adjusting the sequence

Changing the generated sequence can be done in the AMAN window in following different ways:

When manually adjusting the sequence, a confirmation window will always be opened, asking to confirm or cancel the operation.

A flight still in unstable state cannot be moved.

Note:
Moving/adding a flight in only changes position in the sequence. The exact time in the timeline where the flight is placed is calculated by the EuroScope FLEG


3.6 Roles, responsibilities and procedures

In real life. Stockholm (ESOS) receives (and transmits) AMAN data for ESSA. Malmö (ESMM) ATCC additionally receives AMAN data for EKCH also. The MAESTRO tool is managed by APP-C for the arrivals into Arlanda.

The following positions may be responsible managing the arrival sequencing to Arlanda using AMAN as MASTER, beginning with the highest and progressing to the lowest priority:

  1. ESSA_C_APP (No active frequency)
  2. ESOS_PLN_CTR (Separately approved frequency. 123.975)
  3. ESSA_E_APP (When no separate planner is online. 126.650)
  4. ESOS_1_CTR (When ARR-E is not separately manned)

Note: Any controller not responsible for managing AMAN may receive data as SLAVE.

ESMM may receive data about the planned sequencing into Arlanda, they do however not act on it, unless requested to by adjacent ESOS sectors (probably as it is too early with a relatively unstable sequence, unless severe delays are indicated/expected).

Mainly the ESOS-sectors adjacent to Stockholm TMA monitor and judge/act on the AMAN data.

The position acting as MASTER shall keep manual changes to the sequence to a minimum

Suggested procedures when AMAN is in use (ONLY after prior coordination):

When only parts of the sequence is indicating a delay, ESOS ACC does not have to act on that information.
If all inbounds show several minutes to lose, consider holding or delaying inbound traffic as appropriate (Use common sense, TTL and TMA/TOT numbers may help in judging this)

At times of higher workloads in the TMA, it is preferable that ACC hands over traffic excactly according to FF STA (no more "current delay" remaining).


3.7 Getting started

So now you've read through the entire wiki page and the pdf documentation? Great! What's next?

Open the Setup window (see 3.3.1), enter the airport identifier in the ICAO window, select the desired operation mode.
After selecting operation mode, it should look like below:

To receive the web password for acting as MASTER, send an Email to max.kuhla@vatsim-scandinavia.org
or contact me via Discord (199890517914288128 or maxlk96)

MASTER:

SLAVE:

Click "Ok", and get to work, sequencing, or observing the sequencing!

Note: You do not need to have the AMAN window open to keep receiving updates to the sequence.
(when working ACC, all the information you need is in the TopSky track label, if all is working as it should for the MASTER)

3.8 Tips and Tricks

Runway rates:
The runway rate preset in the system is defined by enviromental factors (high speed exits, runway used for departure simultaneously).
The actual available rate might be limited by human factors, such as:
• Controller capacity and experience (how consistent spacing can be produced)
• Pilot reliability (how quickly do they react, and how compliant are they in following instructions )

If the outputted numbers make no sense:
Try checking the aircraft in front of (below) the delays. Is there a time gap in front of him?
Also check all relevant FLEGs to see if they are correct, as they are used for the sequencing calculations.

If the final keeps getting longer: Maybe the arrival rate has to be lowered (See 3.3.2).
Alternatively, you can manually put in a slot behind one of the arrivals, in an attempt to give DIR a chance to catch up, and shorten the final.

When planning a runway change: Use time based slots to facilitate a smooth runway change, preventing that arrivals are planned to land on both runways at the same time (unless that is allowable).

When relieving the MASTER:
1. The relieving controller connects as SLAVE, (to fetch the planned sequence).
2. The relieved MASTER disconnects by selecting Standalone or SLAVE.
3. The relieving controller connects as MASTER.


Revision #46
Created 5 July 2023 20:09:21 by Max Kuhla (1157125)
Updated 6 February 2025 17:22:21 by Max Kuhla (1157125)