Download or read book Ground Observers' Guide written by United States. Air Force and published by . This book was released on 1951 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Purpose and Scope - This manual is published for the information and guidance of the civilian Ground Observers in the Air Defense System. It provides a complete description of their duties and responsibilities. Contents - The first part of this manual explains the operation of the Air Defense System and specifies the reporting procedures to be followed by Ground Observers. The second part of this manual includes the illustrations and other data required for aircraft identification."--Page i.