This man learned to fish on a river near Vilnius, Lithuania (which according to this man is similar to the Penobscot River in Maine). This man's late wife's uncle, Admiral Yuri Padorin, receives a letter from this man, informing the admiral of the crime that he is about to commit. Identify this submarine captain who is chased by Jack Ryan and the Soviet navy in the Tom Clancy classic, The Hunt for Red October.
Marko Ramius