Fig. 6

Range test of detection efficiency categorized by sound speed difference (SSD) indicating the effect of thermal stratification to a V9 transmitter sitting at 11 m depth, b V9 transmitter sitting at 50 m depth, c V16 transmitter sitting at 11 m depth, and d V16 transmitter sitting at 50 m depth. In these plots, the black broken vertical line is a whisker plot of data from each receiver at the various sounds speed category. For these whisker plots, the red marker is the median, and the vertical blue solid line marks the 25th percentile (bottom end) and 75th percentile (top end)