Swap Slot

Function presentation

This window is used to send a request to exchange slots in a Regulation flight list.
The slot swapping function allows to issue requests :

to exchange a selected flight with an identified free slot.
to exchange the published slots of 2 flights identified in the same Regulation flight list.

Opening the window

The window may only be activated when a flight is selected in a Regulation flight list.
The swap request message can only be sent for flights with a published slot. The flight may already be in TACT Activated state.

From a Regulation flight list,

use the option Swap 1 with a free Slot to open the Swap Slot dialog with a single flight selected for swapping.
use the option Swap 2 Slots (new/reset) to select/unselect a first flight followed by the option Swap Slot with xxx to open the Swap Slot dialog with 2 flights selected for swapping.

When such a window is opened, no other function may be invoked.
This display shows the slot swapping request to be sent. This message is sent when a flight shall get a better slot position inside a Regulation Flight List.
The reply to such a message is either the confirmation that the requested swapping has been performed or an error message justifying why the swapping could not be performed.
Here are the different data elements presented in the opened dialog :

Opened: local stamp when the dialog was opened.
Warning message.
Regulation: identifies the Regulation affecting the selected flight(s).

The Swap Flight group box lists data elements related to the first flight to be swapped:

ARCID: callsign of this flight.
ADEP: aerodrome of departure.
EOBT/D: Last Estimated Off Block Time and Date.
Current CTOT: the current Calculated Take Off Time.
Current CTO: the current Calculated Time Over the reference of the regulation (this time might be identical to the CTOT in case the regulation is on the Departure Aerodrome).
New CTOT: desired Calculated Take Off Time resulting from the slot swapping operation.
New CTO: desired Calculated Time Over resulting from the slot swapping operation.
MINLINEUP Minimum time needed for the flight to get from its present holding position to airborne (if not provided, the taxi time is used).

The With Flight group box lists the same data elements on any second flight to be swapped with.
The With Flight group box is hidden when the first flight shall be swapped with a free slot (option Swap 1 with a free Slot in the menu).
The swap request is already prepared and only the MINLINEUP field(s) can be supplied. If not provided, the taxi time is used.
In case of a swap with a free slot, either the New CTOT or New CTO shall be provided. The other value is automatically calculated by the application. These New CTOT and New CTO fields are protected in case of 2 slots swapping.
New CTOT and New CTO values are considered as desired values with some tolerance.
When ready, the Send button shall be clicked.
If the slot swapping is successfully performed, a message is displayed with the newly allocated slot(s).
In case of rejection, the reason is displayed in a message box.
The new slot position of the flight that has improved is forced and will no more be modified by the slot allocation system (CASA).
To close the window without sending the message, click on Cancel.

Displaying the query results

After clicking the Send button, the message is issued to the CFMU system.
The result of the swap request is displayed in the bottom message box when received.
It includes :

The processing stamp of the CFMU system.
The result of the swapping operation, if successfull (for example: New CTOT for flight ... is ...)
The error message in case of failure.