You can now browse the collection by class or unit number. Suppose you know a relative who was in class 44-D, but you’re not sure at which air field he or she was stationed. You can display the items associated with all classes that were numbered 44-D. This narrows down the book in which your relative might appear.
Each of several air fields had a class 44-D, but these were all separate and unrelated class groups. For example, class 44-D at one field may have been a primary pilot class, while at another field 44-D was an advanced pilot class.
To browse by class or unit, follow these steps.