Hake fleet activity and calibration indices derived from the commercial fleet south of 41° S. In this work the activity of fishing fleets south of 41° S is described. In order to establish the standard group of vessels, density indices derived from research cruises and ice-chilling fleets were related. Group four (1,400-1,800 HP) related better to the abundance trend. Besides, two series of indices associated to different fractions of the population were estimated: juveniles (age 2) and adults (age 3-5). Finally, a total CPUE for the region south of 41° S, which showed a declining trend during the period considered (1991-1997), was calculated.