<111> laue x-ray image
The laue x-ray image is used to navigate from one
orientation to another.  Seen here is the <111> face.  
The line up and to the right (about 60 degrees from
horizontal) contains a spot which is the <211> crystal
face.  To produce a <211> wafer, we use this picture to
rotate the ingot 19.5 degrees in the <211> direction.
<211> laue x-ray image