Finnish submarines in WWII

[Saukko]

Next sunday at 16:00 Finnish TV2 airs 40-minute dokumentary "Sukellushälytys" about Finnish submarine operations during WWII.

Read more here. (Finnish only)

Anyway, what is most interesting that during the war Finnish subs were used directly againts Soviet submarines, and managed to sink three, including one by ramming.
As far as I know Germans lost six boats in the gulf of Finland, and the Soviets lost 40 boats, most of them by mines, not a single Finnish sub were lost, althought there was a several close calls, like when Saukko during depth charge attack stopped her engines and descended to bottom, most of the crew lost consciousness because of lack of oxygen, but those few who were still conscious managed to surface the boat.

Good english language site:
http://users.tkk.fi/~jaromaa/Navygallery/