Kind of forgotten but Iran maintains a military naval base on the Caspian Sea. Recent events mean that Iran is starting to move assets to the regime and even submarines..... http://rt.com/news/submarines-caspian-iran-oil-123/
http://news.nationalpost.com/2013/03/18/tehrans-homemade-destroyer-iran-launches-1400-ton-battleship-into-caspian-sea/