Aerial reconnaissance
Aerial reconnaissance using heavier-than-air machines was an entirely new science that had to be improvised step-by-step. Early operations were low-level flights with the pilot often dismounting from the plane to report verbally to the nearest officers. Photographic support was urgently developed, initially requiring a full-time photographer on board to handle the heavy, awkward equipment. The interpreting of aerial images was an important new speciality, essential for accurate mapping. By 1915, air-to-ground radio was in use for reconnaissance pilots.