This work, originally published in 1917, is an instructional publication on how to fire weaponry at aircraft. It includes notes and diagrams on the mathematics of aiming and numerous tips on haw to improve accuracy. This book is part of the World War One Centenary series; creating, collating and reprinting new and old works of poetry, fiction, autobiography and analysis. The series forms a commemorative tribute to mark the passing of one of the world's bloodiest wars, offering new perspectives on this tragic yet fascinating period of human history. Each publication also includes brand new introductory essays and a timeline to help the reader place the work in its historical context.