Dataset {
    Sequence {
        String CRUISE_ID;
        String GEAR_TYPE;
        String CAST;
        Float64 PRES;
        Float64 TEMP;
        Float64 SALT;
        Float64 FLUOR;
        Float64 PAR;
        Float64 PHOSPHATE;
        Float64 NITRATE;
        Float64 CHLOROPHYLL;
        Float64 DOX;
        String DOE;
        String DOC;
        String UOE;
        String UOC;
    } hydro_data;
} hydro_data;