Panel 8 has an article about the Britsh having sunk 74 ships in the Pacific. I find it interesting that although there is much coverage of U boat activity in the Atlantic, it appears that their are no British or Amercian submarines in the Atlantic. Even the day by day review post does not report any.
Was this purposeful or is it just not being reported?
IIRC, the allies were using mostly blimps, planes and destroyers to kill U-boats towards the end of the war. It wasn’t remotely efficient to use subs to hunt German U-boats.
Our subs were mostly in the Pacific strangling Japan’s raw material supply lifeline!
There was no German shipping in the Atlantic to attack. After the Bismarck was sunk German surface ships rarely left port. In those days subs were poor at anti-submarine warfare, so there was really no need for them.
On the other hand, we were trying to do to the Japanese what the Germans had done to Anglo-American shipping, only on a more successful basis. So, we sent as many subs to the Pacific as we could.
What would they attack?
Earlier in the war, the Brits (and one Polish boat) operated in the North and Baltic seas. The British subs were also active in the Med against the Italians. The few German merchant ships in the Atlantic were those caught in neutral ports when the war broke out and they made a run for home.
Interesting brief overview of the disproportionate costs of submarine warfare here: http://www.navy.mil/navydata/cno/n87/history/wwii-campaigns.html
More than a few U-boats outbound and inbound from Saint Nazaire and La Rochelle were sent to the bottom by British subs laying in ambush.