When I operated the 767 we had a TO minimum of 75m ( same as our CatIII NDH landing minimum ) because the a/c had a PVD (Para Visual Director ).
If you havn't seen one of these it looks like a barbers pole set horizontally in the edge of the glareshield straight ahead of each pilot. It is controlled by the flight director according to localiser deviation and appears to stream to left or right if you deviate from the centreline. If you lose sight of the centreline lights because of a thick patch of fog you simply steer the a/c in the usual manner so as to follow the streaming, ie to keep the stripes stationary.
Never had to make use of it in anger but it was pretty easy to use in the sim.