The UK authorities required the addition of a stick nudger in certification of the early B747-100 as ordered by B.O.A.C.. If it was fitted to the later -100s and the -200s, then it was almost certainly de-activated, as a nudger was not part of stall recovery techniques as taught. The -400s did not have a nudger fitted. As has been described earlier, the stalling characteristics of the 747 family are quite gentle compared to other types.