http://en.wikipedia.org/wiki/Russian_monitor_NovgorodMajorDolphin said:
...100-year old type of russian warship shaped like a circle but with a block superstructure? Wouldn't be the first time Russia has failed to mention a naval incident. (although, 100 years, maybe it started the tradition?)
I don't think anyone knows what it really is for sure just yet, but I for one will be interested to hear the truth of it with or without the involvement of little green men.