Dataset {
    Sequence {
        String CRUISE_ID;
        String GEAR_TYPE;
        String CAST;
        String GEAR_SN;
        String OP_CODE;
        Float64 LAT_DD;
        Float64 LON_DD;
        String GMT_DATE;
        Float64 GMT_TIME;
        Float64 GMT_YDAY1;
        Float64 STA_BTM_DEPTH;
        String STA;
        String STA_STD;
        String VESSEL_NUM;
        String DOE;
        String DOC;
        String UOE;
        String UOC;
    } hydro_event;
} hydro_event;