Fig. 3. Comparisons of labor-intensive and shortcut methods of estimating dive parameters. (A) Estimates of work per flap for 210 flaps derived independently by both techniques. (B) Estimates of work per flap from 21 dives with flaps from the same dive averaged. The number of flaps per dive ranged from 7 to 12 and averaged 10. All data points lie below the line of equality (broken line), indicating that slightly lower values were generated by the shortcut technique.