ACAO/CAAS “Revised International Standards on Obstacle Limitation Surfaces “

Date : 11:49 / 09-02-2026

In the framework of the cooperation between the Civil Aviation Authority of Singapore (CAAS) and the Arab Civil Aviation Organization (ACAO) based on the MOU signed in 2023, to renew their commitment for providing aviation training for the civil aviation sector in the Arab region, a training course on “Revised SARPS on OLS” has been conducted as an implementation of the on-site training part of the MOU.


The event, jointly organized by the ACAO and CAAS, is taking place from 8th to 12th February 2026. The Qatar Civil Aviation Authority (QCAA) has generously hosted this significant training program.
Obstacle Limitation Surfaces have long been a cornerstone of aerodrome safeguarding. However, as aircraft technology, operational capabilities, and aerodrome environments continue to evolve, likewise our regulatory frameworks. The revised ICAO SARPs on OLS represent a significant shift in both concept and application, moving beyond purely geometric surfaces toward a more performance-based and risk-informed approach.


This course has been specifically designed to support States and aviation professionals in understanding and implementing these changes. It has been targeted to identify the key changes in the revised OLS concept, with particular emphasis on how these revisions affect aerodrome planning, obstacle assessment, and regulatory decision-making. The course being also an opportunity to examine the implications of aircraft performance on OLS, recognizing that modern aircraft capabilities play an increasingly important role in determining obstacle acceptability and operational safety.


The strength of this course lead not only in its technical content, but also in the exchange of experience among participants. The training course spanned five days, incorporating a comprehensive range of interactive sessions, case studies, and practical exercises. 


The course is recognized by ICAO and if successfully accomplished, participants would receive an ICAO completion Certificate. 


The collaboration between ACAO, Singapore CAA, and QCAA highlighted the commitment of aviation authorities to promoting safety. The event successfully fostered networking and collaboration among participants, creating a robust platform for future information sharing and cooperation. The impact of this regional training program is expected to be felt throughout the aviation community, positively influencing flight operations and ensuring a safer sky for all.


CAAS has always been considered as a valuable partner of ACAO, especially for its significant contribution to capacity building in the civil aviation sector”.


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