artillery reconnaissance and observation

observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)

observation point / observation post (OP)

missile and artillery reconnaissance unit

artillery and rocket artillery

forward observer (FO), forward observation officer; (artillery) observer / spotter

artillery observation post

artillery observation unit

field artillery observation battalion

forward artillery observation point

anti-aircraft artillery observation aircraft

artillery group observation post

artillery groupment observation post

artillery instrumental observation

artillery observation

artillery observation aeroplane

artillery observation aircraft

artillery observation helicopter

artillery observation plane

artillery observation post vehicle

artillery observation tank

artillery observation tower

artillery observation vehicle

forward artillery observation post

mobile artillery observation post

vehicle-mounted artillery observation post

artillery forward observation officer

counter reconnaissance / counter-reconnaissance

artillery reconnaissance

artillery electronic reconnaissance

artillery instrumental reconnaissance

artillery optical reconnaissance

artillery radar reconnaissance