<page_title> German submarine U-633 </page_title> <section_title> Summary of raiding history </section_title> <table> <cell> 3,921 <col_header> Tonnage (GRT) </col_header> </cell> <cell> Sunk <col_header> Fate </col_header> </cell> </table>
U-633 sank a ship with a total of 3,921 gross register tons (GRT).