Histogram stats - Sample Cast
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     Cast 6
       Mean sigma:       26.2593       RMS: 0.0019848
       Mean theta:       19.2525       RMS: 0.012326
       Mean salinity:    36.7034       RMS: 0.0029184
       Mean Pressure:    113.2464       RMS: 2.9766
       Mean Chlorophyll: 0.52177       RMS: 0.63719