Kati Ahnert

National (NfL I 328/01 respectively NfL I 92/13) and international (ICAO Annex 14 respectively EASA CS-ADR DSN) specifications and dimensioning of the Obstacle Limitation Surfaces (OLS) support the purpose to assure conflict free procedure design within the TMA. This is realized by a surface system, which limits any kind of obstacle in its vertical dimensioning depending on its relative position to the aerodrome.

However, the historical grown dimensioning of the OLS is not correlating with actual navigation accuracy of modern aircrafts. In Consequence, navigation performance based RNP/RNAV procedures require limitation surfaces with constant width, which is far away from nowadays sweeping geometry, e.g. implemented by the approach funnels.

It is true that appropriate safety analyzes are still pending to verify the new areas of expectation, depending on the procedures used. The ICAO, however, foresees a continuous certification of the airspaces and routes according to the PBN (Performance Based Navigation) concept in the medium term, so that a redesign of the obstacle limitation surfaces is necessary with regard to their spatial dimensioning and their legal validity for aerodromes.

So far, results show the significant need to regard design requirements of ICAO document 8168 (Procedures for Air Navigation Services - Aircraft Operations - PANS-OPS) in addition to the PBN concept, because of its insufficient precise requirements for departing traffic, as design criteria for departure surfaces. The ICAO PANS-OPS document offers the possibility to analyze the procedural planning limits (vertical and horizontal) up to multiple departure procedures. This knowledge, enables a justified dimensioning of OLS by taking the actual navigation performance of aircrafts into account (LFZ).

• Quantitative, simulationsgestützte Risikoanalyseverfahren des Luftverkehrs auf Basis technischer, verfahrensbedingter und menschlicher Leistungsmerkmale
• Methodische Ermittlung von Safety Performance Indikatoren für die LCAG im Rahmen einer SMS Implementierung
• FIS - Das Forschungsinformationssystem des Bundesministeriums für Verkehr, Bau und Stadtentwicklung
• IN2SAI - Increasing young women's participation in Science Studies and in the Aeronautic Industry, EU Projekt im Rahmen des EU Lifelong Learning Programme

• DA Albrecht (2017): Development of a predictive fatigue risk management system on the example of European Air Transport Leipzig GmbH
• Research Internship Adamik (2017): Analysis and modeling of accident location distributions of small aircrafts during take-off and landing accidents for the determination of air traffic external risks

• DA Rang (2017): Analysis of design features of procedure planning according to ICAO PANS-OPS with the aim of a methodical transfer to the redesigned the take-off climb surface as part of the obstacle limitation surfaces

• StA Steinmeier (2017): Development of a methodical procedure for determining alternative routes in the case of an engine failure on the standardized departure route (SID)

• StA Brünner (2016):Modernization of the strip surrounding the runway on the basis of empirically determined accident consequences areas

• StA Schubert (2016): International comparison of existing obstacle limitation surfaces at airfields to derive potentials for a new concept in the framework of the ICAO PBN concept

• DA Werner (2015): Development of a concept for the methodical redesign of selected obstacle limitation surfaces by identification of requirements according to ICAO PBN

• StA Gallmeister (2014): Identification of operational safety performance indicators for the enroute segment

• DA Koal (2013): Development and implementation of safety-optimized maintenance processes for the systematic avoidance of disruptions using the example of Condor Flugdienst GmbH

• DA Haake (2013): Development of a general model for forecasts of the traffic development of the GA / BA with extended planning horizon

• DA Schlosser (2012): Development and Evaluation of Safety Performance Indicators (SPI) for Airline Operations

• DA Duddeck (2012): Definition of safety performance targets ​​(SPT) of individual safety performance indicators (SPI) for the field of ​​ground handling as part of the further development of the Safety Management System (SMS) for airlines

• DA Dettmann (2012): TMA complexity factors  for the use of safe

• StA Kaden (2012): Categorization of helicopter aerodromes for the establishment of specific building related limitation surfaces

• StA Gaunitz (2012): Development and analysis of user-specific safety promotion methods for the distribution of an airline SMS using the example of Lufthansa Cargo AG

• StA Bienert (2012): Analysis, conception and evaluation of a method for the integration of wind uplinks with optimization of flight trajectories during descent and approach

• DA Gähl (2011): Categorization of aierodromes under the aspect of the redesign specific building related limitation surfaces according to §12 LuftVG

• StA Garcia (2011): Requirement analysis of future the air transport system regarding potential transport models, techniques and procedures with focus on the TMA