Eighteen of U-732 's crew were rescued , eight by Douglas , with 31 killed .
On being spotted , the commanding officer of U-732 ordered that the submarine be scuttled , but before the submarine sank , Douglas attacked with 10 more depth charges .
Eighteen of submarine 's crew were rescued , eight by Douglas , with 31 killed .
On being spotted , the commanding officer of U-732 ordered that the submarine be scuttled , but before the submarine sank , Douglas attacked with 10 more depth charges .