Examples illustrating procedure for defining
angles of flexing of body segments and monofin and based on points marked
in the axes of joints and tail, in the middle and on the edge of the
monofin. A – Angle of flexion in knee joints, B – angle of attack of
the monofin’s front part, C- angle of attack of the end part of the
monofin, D - angle of attack of
the entire surface of the fin.