From Fox News:
The U.S. Coast Guard announced Thursday it detected a Russian military spy vessel operating near U.S. territorial waters Oct. 29, and personnel are continuing to monitor the ship.
Officials said the Vishnya-class intelligence ship was about 15 nautical miles south of Oahu, prompting a response by the Coast Guard HC-130 Hercules from Air Station Barbers Point and the Coast Guard Cutter William Hart. The Coast Guard responded to the Russian Federation Navy Auxiliary General Intelligence ship, Kareliya, by conducting a safe and professional overflight and transiting near the vessel, according to a news release.