active 2025-11-04 - [Enroute] LAC South - Splitting Procedures (Seaford)

[VATSIM UK Operations]

Valid 4 November 2025

A temporary arrangement is permitted to split Sector 18 ("Seaford") during WorldFlight. For this event, London Upper Sector (LUS) is permitted to be opened without AC South online.

Any errors in procedures should be reported to the Operations department via the Helpdesk or Discord.

 

Available Position(s)

Seaford (Sector 18) - LON_SF_CTR (Relief: LON_SF__CTR)

Frequency: 135.055 MHz
RTF callsign: London Control
Coordination callsign: Seaford
Top-down responsibility for: TC South West

Seaford (Sector 18) is a split of the Worthing sector. Its area of responsibility is as shown in Figure 1. TC South West is covered top-down by the Seaford controller when a TC position covering the sector is not online.

🗺️There is no standalone Agreed Levels Diagram for the Seaford sector. Controllers should use the Worthing and Dover diagram, cross referenced with the sector diagram below in order to visualise agreements. Additional agreements are specified below.

 

Agreed Levels

Note: Only additional agreements between Seaford (S18) and Worthing/LUS are detailed here.

 

From LUS to Seaford (Sector 18)

To	Agreement	Conditions
LFOB, LFOP	FL310 lvl SFD	Via UM605
LFP*	FL330 lvl SFD	Via UM605
Paris TMA	Descending FL310	Via L151/UN859 LUS shall issue an 'expect level' of FL270 by SITET

 

From Worthing to Seaford (Sector 18)

From	Agreement	Conditions
EGGW, EGWU	FL210 lvl abeam MAY	If traffic is climbing well, Worthing may transfer traffic to LUS at a higher level, instead of Seaford

 

 

Coordination with Adjacent Sectors & Units

Paris/Brest ACCs

LTMA outbounds shall be allocated a maximum level of FL290 and transferred to Paris.

If an aircraft is climbing well, Seaford may climb aircraft to a Brest level (FL310+) subject to coordination with LUS. The aircraft must reach Brest airspace by the FIR boundary (i.e. cross SITET/XAMAB at FL295+).

• and coordination is agreed with LUS to climb above FL295 

Dover/TC SW

ELDAX inbounds will be transferred directly to TC SW from AC Dover.

 

Figure 1 - Seaford (Sector 18) Area of Responsibility