USS Baton Rouge
Renewed surveillance had its price. On February 11, 1992, the USS
Baton Rouge (SSN-689) collided with a Russian Sierra-class boat, among
the newest and quietest to come out of the Soviet shipyards. Baton
Rouge was tracking the Sierra near the 12-mile limit off Murmansk when
the American commander lost his contact, which then struck Baton Rouge
from below. Neither sub was damaged much, and nobody was hurt.
But the incident was embarrassing.
Source: Blind Man's Bluff: The Untold Story of American
Submarine Espionage: pg 266