[LukeFF]

Originally Posted by shanec

Here is a link that does show it in game:
http://www.subsim.com/sh4/silent_hunter4_addon.php

I do remember seeing a Electro in the water next to a japanese carrier group screenshot also if I recall correctly.

It's not the XXI but the Type XVIII, off of which the XXI was ultimately designed.

(In essence, though, it could be the XXI. I imagine it won't take someone long to clone it and give it XXI performance characteristics).