Matt Guthmiller on MSN

This is what happens when visibility drops to the edge of legal limits

With fog reducing visibility to just a few hundred feet, this ILS approach pushes the pilots directly to their decision ...
Flightglobal

A320 terrain near-collision inquiry: ILS ‘masking’ threat of mis-set altimeter

French investigation authority BEA believes the prevalence of ILS approaches has obscured an underlying vulnerability of aircraft to the risk of terrain collision arising from incorrect altimeter ...