Strategic Lateral Offset Procedures (SLOP) are mitigating the risk of vertical collision and wake turbulence encounters between aircraft with high precision navigation capabilities. Provisions of SLOP are published by ICAO in Doc 4444 Air Traffic Management as special procedures for oceanic and remote continental airspace. Strategic Lateral Offset Procedures are pilot initiated and more or less transparent to controllers. After the mid-air collision in Brazil, some stakeholders in air transport industry highlighted the issue that SLOP have not been implemented by Air Traffic Services (ATS) authorities as widely as possible. ICAO has since started to investigate and develop SLOP to extend its applicability to other than oceanic and remote airspaces.
IFATCA Policy is:
Where SLOP is implemented:
|See: WP 90 – Arusha 2008, WP 92 – Dubrovnik 2009 and Resolutions B6 and B7 – WP 93 – Conchal 2019|
Last Update: October 2, 2020