Looking at his map, it was as expected, since the map in lost world operated based on exploration, so there was nothing to look at except smooth and blurted out textures.
Naturally, Yamamoto had to pull up his mental map of the dungeon to navigate going forward. There was no way to say he knew every single part of this dungeon, but as far as the correct path was concerned, he could lead a blind person though while blindfolded.
Rather than simply getting you lost and strain you mentally with looping corridors and the likes, the Abandoned Armory was designed to be as deadly as possible, and that also at every turn where it was possible. From pressure plates that triggered terrible traps, to false floors that collapsed into deadly traps and environments, to ceiling mechanics, golems… there was a lot.
With all this, it was a good thing that Yamamoto knew what to do and when to do so.
