Aircraft on ILS approach in Class E airspace has near miss with glider...

On 15 October 2017, a business jet on base leg for an easterly ILS approach at St Gallen-Altenrhein came into close proximity with a reciprocal track glider at 5000 feet QNH in Class ‘E’ airspace in day VMC with neither aircraft seeing the other until just before their minimum separation - 0.35 nm horizontally and 131 feet vertically - occurred. The Investigation attributed the conflict to the lack of relevant traffic separation requirements in Class E airspace and to the glider not having its transponder switched on and not listening out with the relevant ATC Unit.

The ground tracks of the Falcon 2000 (red) and the Glider (blue) showing Controlled Airspace Classes, the St. Gallen-Altenrhein ILS LLZ (dashed black line), the conflict CPA (red circle) and the Friedrichshafen TMZ (purple shading) all depicted on the AIP Glider Map. [Reproduced from the Official Report]