Fig. 4. Swimming speed, depth and swaying acceleration during typical shallow dives made by Individual 4 in (A) weighted and (B) unweighted conditions, and deep dives made in (C) weighted and (D) unweighted conditions on July 5, 2005 (A,C) and July 6, 2005 (B,D). Vertical broken lines separate dives into three phases: descent, bottom and ascent. Swimming behavior during descent and ascent is categorized as prolonged glide (white horizontal bar), stroke-and-glide swimming (grey horizontal bar) and continuous strokes (black horizontal bar) (see `Results' for categorization).