I’m surprised nobody else has commented this, but something similar actually happened.

The submarine pictured above was the Soviet Victor class submarine K-314.

March 20, 1984 found the K-314 shadowing an American carrier strike group in the Sea of Japan. The USS Kittyhawk was conducting joint exercises with South Korea, and the Russians wanted to watch. K-314 had been following the Americans, having penetrated the screen several times. Today was different though. Bad weather had made the submarine lose contact with the carrier. The submarine closed the distance to reacquire contact but couldn’t.

The captain ordered the sub to periscope depth after doing a sonar search. Upon reaching shallow depth, the captain did a periscope sweep, and saw to his terror, the Kitty Hawk bearing down at high speed close aboard, the ship’s engine noise likely blocked by the massive hull shell. He ordered an emergency dive but it was too late. The Kittyhawk ran over the K-314, not knowing it was there.

The collision rolled the sub over, causing many injuries, but sparing the sub’s sail and sensors from damage. A section of the aft outer hull was torn away, the upper rudder was damaged, and the submarine’s propeller was damaged, leaving a blade stuck in the carrier. No flooding was reported, but with the damaged propeller, the sub needed to be towed home.

The Kittyhawk suffered a large hole in the bow that appears to have punctured one of the jet fuel storage tanks, and caused minor flooding.

Here’s the story of the Los Angeles class submarine San Francisco being retired a couple years ago. Occasionally people here mentioned that it once suffered a bad day in 2005.

The Navy is retiring a submarine that miraculously survived a terrifying collision

Ouch

From above link:

“The Los Angeles-class fast-attack submarine USS San Francisco sits in a dry dock in Santa Rita, Guam Thursday, Jan. 27, 2005 for the assessment of damage sustained after running aground approximately 350 miles south of Guam Jan. 8, 2005.

Photo Credit: Mark Allen Leonesio/Navy

On Jan. 8, 2005, the submarine struck an underwater mountain going nearly full speed. The violent collision slammed sailors into bulkheads and equipment. One crewmember recalled chaos and carnage from the impact, which was like hitting a cement wall at 40 mph.

The shocked chief of the watch leaped back into action and actuated the emergency ballast tanks, bringing the sub to the surface from a depth of about 500 feet.”