The FitsTable class is a representation of a FITS binary table. It inherits from the TableTable class. The parent Table is used to hold the binary data of the main table, and a FitsChanFitsChan is used to hold the FITS header. Note, there is no provision for binary data following the main table (such data is referred to as a "heap" in the FITS standard).
Note - it is not recommended to use the FitsTable class to store very large tables.