Contains aerial photographs and illustrations with commentary on their proper interpretation regarding battery emplacement and trench construction. Companion to "Notes on the interpretation of aeroplane photographs."
General Staff (Intelligence), General Headquarters
The following notes are issued in order to facilitate the accurate location of important military features, such as machine gun emplacements, trench mortars, batteries, railways, tracks, buried cables, dugouts, and mine shafts by means of aeroplane...