The latitude nut is set to 30°S and will induce drift of 15° x sinlat = 15° x sin30°

= 15° x 0.5 = 7.5°/hr clockwise (to the right) to compensate for equal and opposite Earth rate at 30°S.  Drift due to Earth rate = 15° x sinlat °/hr = 15° x sin60° = 15° x 0.866 = 13°/hr.  In the northern hemisphere the gyro appears to drift clockwise; i.e. to the right.

If the aircraft was stationary at 60°N we would expect to see the gyro drift at a rate of 20.5° clockwise (to the right) because of Earth rate and latitude nut correction (13°/hr + 7.5°/hr = 20.5°/hr).   If the gyro is observed to be drifting at a rate of 15.5°/hr to the right (clockwise) there must be drift of 5°/hr to the left (anticlockwise) due to transport wander.