Histogram stats - Sample Cast
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     Cast 2
       Mean sigma:       26.2592       RMS: 0.0032901
       Mean theta:       19.2548       RMS: 0.014735
       Mean salinity:    36.7041       RMS: 0.0013737
       Mean Pressure:    90.4613       RMS: 5.9269
       Mean Chlorophyll: 0.6637       RMS: 0.24081