VATGER Letters of Agreement

Each agreement is defined by the following properties on a list of agreements in a directory structure of transferring_fir/receiving_fir/any_file_name.toml, i.e. EDMM/EDUU/south.toml and EDMM/EDUU/east.toml both defining parts of the LoA for traffic from EDMM to EDUU, split further to increase manageability.

[[agreements]]
adep = string[] | null
ades = string[] | null
runway = string[] | null
cop = string | null
routeBefore = string | null
routeAfter = string | null
level = int | null
transferType = "C" | "D" | null
sfl = int | null
levelAt = [int, string] | null
qnh = string | null
releases = "C" | "D" | "T" | "F" | null
remark = string | null
fromSector = string
toSector = string

adep

ICAO identifier of departure airports, one of which must match for the agreement to apply. If adep and ades are specified one of each must match.

ades

ICAO identifier of destination airports, one of which must match for the agreement to apply. If adep and ades are specified one of each must match.

runway

Active runway of one of the airports in ades or adep.

cop

Coordination point of the agreement, null if the agreement shall apply to any traffic from fromSector to toSector.

routeBefore/routeAfter

Route elements prior to or after the cop. This can be an airway or IFPS compatible route elements: i.e. "T161", "KOSIX L986 MAG"

level

Flight level at which the traffic is to be transferred. null for traffic that needs individual coordination.

transferType

"C" for transfer of traffic climbing to the specified level, "D" for descending, ǹull for traffic to be at level.

sfl

Supplementary flight level, the level out of which the traffic has to be climbing, descending. (transferType)

levelAt

Additional specification for the location where the traffic has to meet the transfer conditions:

• null: 0.5 * radar separation to border
• [-5, "KPT"]: latest 5 nm prior to KPT
• [15, "MAH"]: latest 15 nm after MAH
• [0, "RUDNO"]: latest at or abeam RUDNO

qnh

For agreements where traffic is transferred at an altitude, the value of this property is the ICAO code of the reference QNH, i.e. 8000ft on EDDM QNH:

[[agreements]]
cop = "TITIG"
level = 80
sfl = 120
ades = ["LOWS"]
transferType = "D"
qnh = "EDDM"
fromSector = "ed/DMSL"
toSector = "lo/LOWS_APP"

releases

If traffic is:

• "D": released for descent
• "C": released for climb
• "T": released for turns
• "F": fully released
• null: not released

remark

Further remarks for more specific releases or conditions.

fromSector/toSector

Sectors from and to which traffic is transferred, identified by vatglasses file and key "file/ID", i.e. "ed/ZUG".