Well, they aren't really new, but I got a request to release the subs from the X-COM mod separately - so here are them 
DL (ca. 1.5MB)
http://www.civfanatics.net/uploads7/XSubs.zip


DL (ca. 1.5MB)
http://www.civfanatics.net/uploads7/XSubs.zip






I noticed something in the gameplay. When the sub, especially the third one, baracuda xsub, is in the coastal waters, it looks ok. When in city, or sea, or ocean, it looks as if the wings(?) of the sub are being disintegrated.