Figure 56. Graphs showing time series of 1-minute median optical backscatter, transmissometer attenuation, and ADV mean echo intensity from the OBS, 5-centimeter transmissometer, and ADV mounted on profiling arm. Dashed line marks time when tripod tipped over by strong waves and currents. Dotted lines mark times when optical sensors were cleaned by divers. Refer to the Abbreviations and Symbols section.