Histogram stats - Sample Cast
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     Cast 3
       Mean sigma:       26.2592       RMS: 0.0017701
       Mean theta:       19.2531       RMS: 0.0092678
       Mean salinity:    36.7035       RMS: 0.0017237
       Mean Pressure:    88.0819       RMS: 5.9701
       Mean Chlorophyll: 0.96119       RMS: 0.50605