Special edition of a technical manual containing training documentation on three subjects related to instrument flying. The name, "Hottman, W. B." is written in the top left corner of the cover, followed by a handwritten note about returning the manual.

Special edition of a technical manual containing training documentation on three subjects related to instrument flying. A blotch of dark ink is smeared on the front covered.

Special edition of a textbook titled "Instrument Flying: Basic and Advanced," published January 15, 1944. It is split into three sections, all with different creation and publication dates. The first section is titled "Instrument Flying: Basic without Radio Aids" or Technical Order No. 30-100A-1, published June 1, 1943. The second section is titled "Instrument Flying: Advanced with Radio Aids" or Technical Order No. 30-100B-1, published January 15, 1944 to replace T. O. No. 30-100B-1 dated October 1, 1943. The final section is titled "Instrument Flying Army Air Forces Instrument Approach System" or Technical Order No. 30-100F-1, published November 10, 1943.

Textbook titled "Instrument Flying: Technique in Weather" or Technical Order No. 30-100D-1, created January 1, 1944 by authority of the Commanding General of the Army Air Forces.