Artillery Reconnaissance

An army artillery reconnaissance regiment has 2 battalions: the first battalion has a sound ranging battery (zvukovaia razvedka), one radio-technical reconnaissance battery, and one optical reconnaissance battery; the second battalion has a photography battery, a topo-geodetic battery, and a meteorological service battery.

Reconnaissance System Range Error - % Range from Observer Deflection Error - % Rg from Observer or m
Visual Recon Theodolite 0.5-0.8 0.1
Stereoscopic Telescope 0.8-1.1 0.2
Range finder 1.0-1.5 0.2-0.3
(Dependent on range finder base) (1.0-1.2) (0.1)
Flash ranging Large (0.5-0.8) Large (0.1)
Timing flashes Large -
Sound Ranging 1.0 (1.0) 0.4 (0.4)
Helicopter Recon (1.4) (0.9)
Radar A few meters
Visual Detection from an Aircraft (No instruments) 100-150 meters CEP (50-70 meters)
Aerial Photo 15-20 meters CEP