Note 1 — Chapter V
Reading edition
For the benefit of the uninitiated, let me explain that the process of registering consists of finding the exact range to a certain object from a particular gun or battery. To find this range it is necessary to obtain what is known as a bracket: i.e. one burst beyond the object, and one burst short. The range is then known to lie between these two: and by a little adjustment the exact distance can be found.