Article about WW2 Sub campaigns

[frenzied]

http://www.navy.mil/navydata/cno/n87...campaigns.html


While digging around for articles today I found the one linked above, and thought people here would be interested. It is an analysis of the effectiveness, in economic terms, of the German and American submarine campaigns during the Second World War. Interestingly, it comes to the conclusion that the German U-boat campaign didn't truly fail, as the allies spent roughly ten times the amount countering the U-boats as Germany did sending the U-boats out, while only having about four times the economic power.
There are also some interesting figures about just how badly the Japanese merchant fleet and economy was mauled - they were using 46% of their steel on merchant ships by 1945, in an attempt to keep things going.