[rogerbinns]

Planes have been able to land in poor visibility automatically since 1968 using the ILS (instrument landing system) radio waves. There are various categories with category 3 being supported in 1968 (low decision height and visibility).

Autoland systems: http://en.wikipedia.org/wiki/Autoland ILS Categories: http://en.wikipedia.org/wiki/Instrument_landing_system#ILS_c...