PN-I guidance unit (hereinafter the unit) is designed to produce a video signal of a target and to generate the missile control field in the laser beam at distances from 50 to 5000 m.

The unit is a part of the STUHNA-P mobile missile complex.

• Detection (recognition) range of the narrow-field television aiming channel of a typical 2.5 m×2.5 m target in daylight and under meteorological visibility distance not less than 25 km:

under terrain ambient lighting from100 to 104 lux and min. 0.5, km target to background contrast: not less than 6.5 km (TVK-U); 2 km (TVK-SH)

• Detection (recognition) range of the narrow-field television aiming channel of a typical 2.5 m×2.5 m target in daylight and under meteorological visibility distance not less than 25 kmunder terrain ambient lighting not less than 0.5 lux: not less than 2.5 km (TVK-U); 0.7 km (TVK-SH)