PB-1 and PB-2
The PB-1 and PB-2 Periscopic Aiming Circles are precision optical instruments intended for the measurement of horizontal and vertical angles, determination of magnetic azimuths, and range estimation using a 2-metre ranging staff.
They are designed for use at artillery and mortar observation posts and firing positions and can be used for:
- Weapon orientation and establishment of reference directions;
- Topographic surveying and positioning of artillery units;
- Target designation;
- Observation from concealed positions using the periscope;
- Fire correction and observation of artillery and mortar fire.
The PB-1 is graduated in a 64-00 scale, while the PB-2 is graduated in a 60-00 scale
Technical data:
| Magnification | 8x |
| Field of view | without periscope: 6°30’ with periscope: 4°30’ |
| Diameter of inlet pupil | 19 mm |
| Diameter of outlet pupil | 3,2 mm |
| Distance of outlet pupil | 12 mm |
| Possibility of dioptric adjustment | ±6 diopters |
| Periscopicity | 300 m |
| Range of operation | measuring of horizontal angle: 64-00 or 60-00 measuring of vertical angle: ±3-00 measuring of range (by means of picket of 2m): 50 – 400 m |
| Accuracy of angle measuring | 0-01 |
Set components
| Aiming Circle | 1 pc |
| Leather envelope to hold the Aiming Circle | 1 pc |
| Periscope | 1 pc |
| Linen envelope to hold the periscope | 1 pc |
| Tripod | 1 pc |
| Linen envelope to hold tripod | 1 pc |
| Accessories and spare parts | – |