Fig. 4. Searching with the final landmark removed. (A,B) Boundary landmark training (BLT). (A) Search distributions plotted relative to the end of the channel. The lighter portion shows the range of positions of the entrance and first landmark relative to the channel end. (B) Search distributions plotted (as elsewhere) relative to the entrance of the channel (C) Isolated landmark training (ILT). (D) ILT with an additional 2 m of random pattern before the first landmark. For further details, see Fig. 2.