In the US at least, to my knowledge, it is not allowed to land with zero visibility unless there is an emergency. Each approach path to each runway has a "decision height". While you are on approach in instrument meteorological conditions, you can fly the approach completely "blind" up until decision height. At that point, however, if you cannot see the runway by eye or at least see the runway lights by eye, you must abort the landing and fly to your designated alternate landing site (or some other landing site or a different runway at the same airport or sit in a holding pattern until the weather improves). Of course, the above does not determine whether you use Auto-land or do it manually but it does indicate that you should not normally be landing in ultra-low visibility anyway. Sean On Mon, Feb 20, 2012 at 10:53 AM, Tamas Rudnai wro= te: > Interesting, I thought it was the opposite: Once it was really foggy and > the pilot announced that now we will use auto pilot for landing as the > visibility is zero... Everyone become very quiet all in a sudden and some > was praying for the creator of zeros and ones :-) > > Tamas > > > On 20 February 2012 15:21, Chris Roper wrote: > >> On one flight I was on =A0the Pilot came on the intercom after the landi= ng >> and said: >> "sorry for the bumpy landing, regulations state we have to do >> it manually occasionally to stay in practice" >> >> So I guess most landings are under Auto Pilot control too. >> >> On 20 February 2012 17:03, Bob Ammerman wrote: >> >> > > when was >> > > the last time you flew on a robot-controlled airliner? I guess I am >> > > just getting old... >> > > >> > > --Bob A >> > >> > The last time I flew, at least for a good part of the flight, I am sur= e. >> > >> > -- Bob Ammerman >> > RAm Systems >> > >> > -- >> > http://www.piclist.com PIC/SX FAQ & list archive >> > View/change your membership options at >> > http://mailman.mit.edu/mailman/listinfo/piclist >> > >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > > > -- > int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q; > printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }", > q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); } > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .