Feb. 15 (UPI) -- American military authorities are continuing to track and monitor what officials say is a Russian spy ship moving along the United States' eastern seaboard. The SSV-175 Viktor Leonov vessel has been moving in international waters off the East Coast for days, officials said. The ship is purportedly outfitted with sophisticated surveillance equipment. Some authorities said the patrolling boat is the latest provocation from the Kremlin in deteriorating relations with Washington. The vessel was reported to be off the Delaware coast on Tuesday. "A Russian spy ship patrolling 30 miles from the Groton sub base underscores that the threats posed by a resurgent Russia are real," Rep.