While ILS is generally considered to be the second most reliable instrument (after the windsock) it has its own problems... For example false glidescope, see h

While ILS is generally considered to be the second most reliable instrument (after the windsock) it has its own problems... For example false glidescope, see http://www.ukfsc.co.uk/files/Safety%20Briefings%20_%20Presentations/Flight%20Ops%20-%20False%20ILS%20localiser%20capture%20BAE%20systems(1).pdf http://www.ukfsc.co.uk/files/Safety%20Briefings%20_%20Presen...