Here is a US Department of Commerce, Civil Aeronautics Administration (CAA) TRAINING MANUAL with the following description from the front cover:
AIRWAYS OPERATIONS TRAINING SERIES
DISTANCE MEASURING EQUIPMENT AND OFFSET COURSE COMPUTER
BULLETIN NO. 4, 3rd EDITION, AUGUST 1952
Manual is in very good condition; a few very light stains/marks, 17 pages, softcover, approximately 11 Black & White drawings and figures.
The following sections are included:
1 DISTANCE MEASURING EQUIPMENT
The Transponder
The Airborne Unit
Frequency Allocation
2 COURSE LINE COMPUTER
R-Theta Navigation Principles
Equipment
Application
3 Study Questions
4 Bibliography
Shipping is by Media Mail with 1-2 week delivery time. AK, HI, and Canada shipping is Priority Mail.
[M207az]
