I am seeking to learn about the role of Survey regiments, and am starting from a base knowledge of about zero.My time-frame is 1940 - 1942, theatre; Middle East. I want to know what is the minimum unit requirement to carry out effective counter battery surveying. It seems that there are three different survey units within a Regiment. "Survey" "Sound Reporting" & "Flash Spotting". The Regiments appear to be broken down into two Batteries, each with three Troops, and the Troops further broken down to Sections. Sections appear to be the smallest denomination. Would you need a Section of each denomination to be effective? Any information would be much appreciated. Kind Regards, David.