• The BG grade beacon provides pitch data in .1 percent increments at grades to 45 percent and in 1 percent increments at grades between 45 to 90 percent.
• Grade bits are shorter and narrower than standard bits to make steering corrections more gradual and to help keep the bore path straight.
• The 86BG is effective to depths of 40 ft.
• The 86BG operates on two C-cell batteries which last approximately 16 hours.