“I pin the laser on the Impala and take another reading. Four hundred thirty yards, line of sight. I push a button on the rangefinder and switch to inclinometer mode. The device calculates the cosine of the angle made between true horizontal and my line of sight. The digital reading is zero-point-eight-seven, equivalent to about thirty degrees. A quick mental calculation gives me the range adjustment. The horizontal range is three hundred and seventy-five yards.”