The problem addressed in this paper is that of fault-tolerant multi-sensor data-fusion for flight
navigation during approach and landing of a civil jetliner. The work falls within the scope of a
large collaborative project on future single pilot operations issues. The proposed
methodology is based on a multi-layer hierarchical architecture which can integrate several
heterogeneous information sources. The study is restricted to three classical information
sources, namely, Inertial Reference System (IRS), Global Positioning System (GPS) and …