Histogram stats - Sample Cast
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     Cast 7
       Mean sigma:       26.2592       RMS: 0.0022371
       Mean theta:       19.2578       RMS: 0.009871
       Mean salinity:    36.7051       RMS: 0.0015503
       Mean Pressure:    90.3724       RMS: 5.418
       Mean Chlorophyll: 0.96618       RMS: 0.71919