Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
German submarine U-30 (1936)
Table title:
Summary of raiding history
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Ship </th><th colspan=1 rowspan=1 > Nationality </th><th colspan=1 rowspan=1 > Tonnage </th><th colspan=1 rowspan=1 > Fate </th></tr>
<tr> <td colspan=1 rowspan=1 > 3 September 1939 </td><td colspan=1 rowspan=1 > Athenia </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 13,581 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 11 September 1939 </td><td colspan=1 rowspan=1 > Blairlogie </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 4,425 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 14 September 1939 </td><td colspan=1 rowspan=1 > Fanad Head </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 5,200 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 December 1939 </td><td colspan=1 rowspan=1 > HMT Barbara Robertson </td><td colspan=1 rowspan=1 > Royal Navy </td><td colspan=1 rowspan=1 > 325 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 December 1939 </td><td class="highlighted"  colspan=1 rowspan=1 > HMS Barham </td><td colspan=1 rowspan=1 > Royal Navy </td><td colspan=1 rowspan=1 > 31,100 </td><td class="highlighted"  colspan=1 rowspan=1 > Damaged </td></tr>
<tr> <td colspan=1 rowspan=1 > 11 January 1940 </td><td colspan=1 rowspan=1 > El Oso </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 7,267 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 16 January 1940 </td><td class="highlighted"  colspan=1 rowspan=1 > Gracia </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 5,642 </td><td class="highlighted"  colspan=1 rowspan=1 > Damaged </td></tr>
<tr> <td colspan=1 rowspan=1 > 17 January 1940 </td><td colspan=1 rowspan=1 > Cairnross </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 5,494 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 February 1940 </td><td colspan=1 rowspan=1 > Munster </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 4,305 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 9 February 1940 </td><td colspan=1 rowspan=1 > Chagres </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 5,406 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 8 March 1940 </td><td colspan=1 rowspan=1 > Counsellor </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 5,068 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 20 June 1940 </td><td colspan=1 rowspan=1 > Otterpool </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 4,876 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 22 June 1940 </td><td colspan=1 rowspan=1 > Randsfjord </td><td colspan=1 rowspan=1 > Norway </td><td colspan=1 rowspan=1 > 3,999 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 June 1940 </td><td colspan=1 rowspan=1 > Llanarth </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 5,053 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 1 July 1940 </td><td colspan=1 rowspan=1 > Beignon </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 5,218 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 6 July 1940 </td><td colspan=1 rowspan=1 > Angele Mabro </td><td colspan=1 rowspan=1 > Egypt </td><td colspan=1 rowspan=1 > 3,154 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 21 July 1940 </td><td colspan=1 rowspan=1 > Ellaroy </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 712 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 1 August 1940 </td><td colspan=1 rowspan=1 > Canton </td><td colspan=1 rowspan=1 > Sweden </td><td colspan=1 rowspan=1 > 5,779 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 16 August 1940 </td><td colspan=1 rowspan=1 > Clan Macphee </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > 6,628 </td><td colspan=1 rowspan=1 > Sunk </td></tr>
</table>
Question:
How destructive was U-30 in encounters not ending in a sink?
Answer:
U-30 damaged Gracia that weighed 5,642 GRT and HMS Barham.