THE SYSTEM COMPRISES OF:
Gyromagnetic Course Unit (BGMK-6A series 1) 
Magnetic Variation Selector (ZMS-3 series 2)
Flux-Gate Detector (ID-6 series 1)
Shockmount for BGMK-6A series 1

SPECIFICATIONS
Error of determination & output of gyromagnetic heading:     
magnetic intensity:
4.8+12.0 A/m (0.06 + 0.15Oe) ..... ±1°
12.0A/m (0.15Oe) min ..... ±0,7°
Error of magnetic heading determination on the ground ..... ±0,5°
Automatic disengagement of erection on receiving roll signal..... ±5-10°
from Resolver Control Transmitter
Mode of input & output signals .....8 V Resolver Control Transmitter
Weight  ..... 6kgs