While we are on this subject, I just gotta vent a bit. To all you drafting teachers out there I have just one thing to say to all of you.
If you aren't teaching this to your students you should be fired! Tenure be damned. This isn't even NEW! It has been an ANSI standard since the 50's! For the mathematically challenged among you that is over 50 years ago!
I don't know HOW many "cad operators" I've had to teach the basics of drafting to over the years. They don't even know SIMPLE drafting rules, like which direction the section line arrows point in relation to the section view, or how to project a view properly. Some of these guys can't even visualize the 3D object. Stop making them learn how to letter and worrying about line quality and teach them something useful. Nobody does work on a board anymore, you can't even hardly buy good drafting tools any more simply because nobody needs them anymore, cad is just too cheap.
Too many people come out of these diploma mills like ITT tech and know how to use Autocad, but haven't a clue how to draft, and it is doing industry a disservice.