Fig. 1

Box-violin plots of empirically calculated Argos error magnitudes for six Argos location classes. Argos locations were compared to temporally matched Fastoc GPS locations for three large whale species (sperm, blue, and fin). Data are presented separately for periods when the tags were attached (top panels) and floating prior to recovery (bottom panels). Sample size is indicated above each location class, with individual observations shown as colored circles (with a different color for each location class) and the mean shown as a dark red circle. Data were collected from sperm whales tracked in the Gulf of Mexico during summer 2011 and 2013, and from blue and fin whales tracked off southern California during late summer 2014 and 2015