Sketches

Referenced in a document on modernizing the turrets in Tennessee and California circa December 1943:

 "The yard proposes to scrap all materials listed as obsolete on Sketch No 102880, Sheets 17 to 25 inclusive..."

A sketch is supposed to be a simple, quick drawing, so on one hand it blows my mind that the Navy had sketches that were at least 25 separate sheets, but on the other hand, if anyone could do it, it would be the Navy!