Distributions without correction for GD effect. (a) Be and (b) Bn stars: histograms of apparent velocity ratios v = V sin i∕V_c; functions Ψ(v) representing the smoothed histograms after correction for observational uncertainties (green curves); functions Φ(u) representing distributions of true velocity ratios u = V∕V_c (blue curves); in (a) Ψ(v) from Zorec et al. (2016) (green dashed curve). Error bars in the smoothed histograms represent the statistical uncertainties that also concern the remaining distribution. (c) Be and (d) Bn stars: same as (a) and (b), but distributions of velocities corrected for GD effect. (e) and (f) histograms, functions Ψ(v) from (d) anddistributions of true velocity ratios u = V∕V_c for Bn star (blue curves), corrected for GD effect and for density probabilities of inclination angles restricted at inclinations i_L = 30° and i_L = 60°, respectively.