3.1 Slot Allocation Process
3.1.1 The slot allocation procedures are applied to all flights subject to ATFCM slot allocation departing from within the ATFCM area or from within the ATFCM adjacent area and entering the ATFCM area.
3.1.2 When no other option is available, a regulation will be applied by
NM and departure times will be issued in the form of a Calculated Take-Off Time (CTOT). This is facilitated by Computer Assisted Slot Allocation (CASA) algorithm within the Enhanced Tactical Flow Management System (ETFMS).
3.1.3 The CASA system is largely automatic and centralised, and functions from an AO’s point of view in passive mode. There is, therefore, no requirement to request a slot as the act of filing a flight plan effectively constitutes a requestIn other words, the act of filing a flight plan effectively constitutes a request for a slot.
3.1.4 Pre-planned or strategic ATFCM regulations are promulgated by the
NM one day in advance by ATFCM Notification Messages (ANM). All changes and tactical additions are promulgated by ANM revision messages.
3.1.5 For flights subject to a regulation, CASA will send a Slot Allocation Message (SAM) containing a CTOT at Estimated Off Block Time (EOBT) - 2 hours. This will be sent to the aerodrome of departure as well as the Aircraft Operator via AFTN or SITA.
3.1.4 After coordination with the FMP, the
NM decides to activate regulations in those locations where it is necessary. ETFMS regulations include the start and the end times, the description of the location, the entry rate and some other parameters. For each regulated point, area or airport, CASA builds and manages a list of slots.
3.1.5 In accordance with the CASA prioritization algorithm, which aims at minimizing the global delay, the system will place the flights in the slots. On this basis, the Take-Off Time (TOT) for the flight is calculated. This information, the Calculated Take-Off Time (CTOT), is transmitted to the AO concerned and to the control tower at the aerodrome of departure at EOBT – 2 hours. The slot is issued at EOBT – 2 hours through a dedicated message, the Slot Allocation Message (SAM), and the slot status becomes Allocated.
3.1.6 Revisions to, or cancellations of, the last issued CTOT may be initiated by NM, the Aircraft Operator, or the FMP/ATC unit on behalf of the AO. AOs requiring assistance should contact either the FM Helpdesk (Tel: 00-32-2-745-1901) or the Tirana FMP (see paragraph 3.2.1.2).
3.1.7 All CTOT revisions or cancellations are to be made using the ATFCM message exchange procedures described in the ATFCM Operations Manual.
3.1.8 Full details of the Slot Allocation Process are published in the ATFCM Users Manual.
3.2 Slot Adherence
Aircraft Operators and ATC are jointly responsible for achieving CTOT compliance at departure aerodromes.
3.2.1 Air Traffic Control (ATC)
3.2.1.1 ALBCONTROL provides a Flow Management Position at the Tirana ACC to liaise between ATC and
NM, and to provide ATFCM support to AOs as shown in the table below:
| FMP | Location | Area of responsibility | ACC Served |
| Tirana FMP | Tirana ACC | Tirana FIR | Tirana ACC |
3.2.1.2 ATFCM enquiries should be addressed to the Tirana FMP between the hours 0800 -1600 (local time), Monday to Friday, excluding Public Holidays, as follows:
Post:
ALBCONTROL
Air Navigation Services of Albania
Tirana ACC
P.O. Box 8172
Rinas, Tirana
Albania
Tel: +355 4 2377721
Fax:+355 4 2343487NIL
AFS:LAAAZDZX
URL:www.albcontrol.al
Outside the hours notified above, ATFCM enquiries should be addressed to the Tirana ACC as follows:
3.2.1.3 ATC is responsible for CTOT compliance monitoring at departure aerodromes. Whereas the exact procedures to be followed will depend on the way that ATS is organized at each aerodrome, the following requirements shall apply in all cases:
- ATC shall ensure that CTOT, if applicable, be included as part of the ATC clearance. ATC shall take account of an applicable slot or flight suspension when a clearance is issued;
ATC shall take account of an applicable slot or flight suspension when a clearance is issuedATC units responsible for CTOT compliance monitoring shall be provided with the necessary information concerning the ATFCM measures in force and CTOTs allocated;- ATC units responsible for departure slot monitoring shall be provided with the necessary information concerning the restrictions in force and slots allocated;
- ATC shall provide all possible assistance to AOs to meet CTOT or to coordinate a revised CTOT;
ATC shall take account of an applicable slot or flight suspension when a clearance is issuedA slot tolerance (-5’ to +10’) is available to ATC for which the aircraft must not depart outside;- ATC may deny start up clearance to a flight unable to meet its CTOT until coordination with the ATFCM units concerned has been effected and a revised CTOT issued.
3.2.1.4 ATC is also responsible for monitoring flights compliance with departure slots (CTOTs) issued by the NM as detailed in the ATFCM Users Manual. A slot window of -5 to +10 minutes is available to ATC to optimise the departure sequence.
3.2.1.4 In accordance with the provision of the Regional Supplementary Procedures, Europe (ICAO Doc 7030), flights which do not adhere to their slot shall be denied start-up clearance. However, ATC shall make all efforts to enable departing flights to comply with the slot. ATC shall liaise with the Tirana FMP to co-ordinate extensions to CTOTs.
3.2.1.5 With the progressive introduction of the NM Enhanced Tactical Flight Management System (ETFMS) and Flight Activation Monitoring (FAM), flights that are not notified as being airborne within 30 minutes of the notified ETOT or CTOT will receive a Flight Suspension (FLS) message. If a flight is suspended during the taxiing phase, then ATC is responsible for sending a DLA message.
3.2.2 Aircraft Operators
3.2.2.1 In order to comply with a CTOT, AOs need to plan the departure of a flight so that the aircraft will be ready for start-up in sufficient time to comply with a CTOT taking into account the taxi time.
3.2.2.2 AOs shall inform themselves of and adhere to:
- general ATFCM procedures including flight plan filing, strategic ATFCM Measures and message exchange requirements; and
- strategic ATFCM measures (including the RAD);
- current ATFCM measures (
includinge.g. specific measures applicable on the day of operationin question, as promulgated by ANM or Flight Suspension (FLS) messages);such as ATFCM slot or flight suspension). - departure slots (CTOTs) issued by the FM and procedures related to changes to CTOTs;
- the NM requirement for the modification or delay of EOBT. This is particularly important with the progressive implementation of NM Flight Activation Monitoring (FAM) whereby flights not notified as being airborne within 30 minutes of the notified ETOT or CTOT will receive a flight suspension message;
- the sole responsibility to obtain a new CTOT if there is no RTF contact with the TWR at CTOT;
- the correct procedure to be followed to obtain approval for the use of STS/ATFMX.
3.2.2.3 In order to comply with a CTOT, Aircraft Operators need to plan the departure of a flight so that the aircraft will be ready for start-up in sufficient time to comply with a CTOT taking into account the taxi time shown in the Slot Allocation Message (SAM). A slot window is available to ATC to optimise the departure sequence. This is not for use by AOs who should plan an EOBT consistent with the CTOT.
3.2.2.3 Where a flight departs from an aerodrome with an ATS Unit, the Aircraft Operator or pilot should obtain information, prior to start up from ATS as to whether a CTOT or FLS affects their flight.
3.2.2.4 Where a flight departs from an aerodrome without an ATS Unit, or when the FPL has been filed with Tirana ARO, it is the Aircraft Operator or pilot's responsibility to determine whether a CTOT or FLS affects their flight. In this case, the Aircraft Operator or pilot should contact the NM or FMP before the aircraft departs.
3.3 Slot revisions
3.3.1 Slot Allocation Message (SAM)
3.3.1.1 A SAM is sent to AOs / ATC any time a flight becomes regulated (new flight entering the system, new period of regulation in the system, in response to an FCM or CHG providing new RVR after a suspension) but at the earliest 2 hours before the last received EOBT.
3.3.1.2 The SAM is used to inform AOs and ATC of the Calculated Take-Off Time (CTOT) for an individual flight.
3.3.1.3 AOs/ATC shall comply with the CTOT. A slot is issued as a Calculated Take-Off Time (CTOT). The CTOT is defined as a time at which the aircraft shall take-off.
3.3.1.4 The calculation of take-off times takes into account the off-block times and an average taxiing time for the runway in use at the airfield concerned.
3.3.2 Slot Revision Message (SRM)
3.3.2.1 An SRM may be sent by the NM:
- To notify all concerned of either a significant change (>5’) to the original CTOT or a modification of the most penalising regulation or both;
- In response to a DLA,
or CHG or DPI when the current CTOT is no longer compliant with the new information; - To notify all concerned of a routine improvement of the CTOT by the revision process for a flight in an RFI status or in a Ready (REA) situation;
- In response to a valid SPA to notify all concerned of the improvement of the CTOT;
- In case of a change of the most penalising regulation.
3.3.2.2 The AOs / ATS must comply with the NEWCTOT.
3.3.3 Slot Requirement Cancellation (SLC) Message
3.3.3.1 A SLC is sent to AOs / ATC to advise that a flight which has received a CTOT is no longer subject to an ATFCM regulation.
3.3.3.2 It may be due to the change in parameters of an existing regulation or its cancellation, to the reception of a message from AOs such as DLA, CHG, and FCM, or a DPI message from the CDM platform.
Note: When the current EOBT is more than 15 minutes in the past a comment ‘PLEASE UPDATE EOBT WITH A DLA MSG’ will be included in the SLC reminding the AO to update its EOBT by sending a DLA. In the meantime, the flight will be counted as departed at taxi time + TIS after the slot requirement cancellation.
3.3.3.3 It may also be due to the reception of a CNL message from AOs.
Note: The comment ‘FLIGHT CANCELLED’ will be present because the slot is cancelled as a result of the cancellation of the flight plan.
3.3.3.4 An SLC does not guarantee that the flight will not be subject to further regulations. If following receipt of the SLC, a new regulation is imposed which affects the flight, the AO will receive a new SAM.
3.3.3.5 When the SLC is issued after EOBT + 15 minutes, the AO must update its EOBT by sending a DLA to IFPS.