Fig. 6

Trajectories and PPVs of two example Antarctic petrels, both with sampling resolution of 10 min. Here PPVs are shown in real 3D (no exaggeration in z dimension). Panel (a) shows the departure and return trajectories in blue and pink respectively, where the trajectories of the two selected birds are shown as connected lines. Panel (b) is the PPVs of the departure trajectories and panel (c) the PPVs of the return trajectories. Note the thinness of the 3D volume when elevation is represented on the real scale and not exaggerated as in Fig. 5