Tanks torpedoes while weakened.

“Torpedoes launched!”  First Mate Voslow answered.  The Akula shuddered twice as the two anti-submarine torpedoes left their tubes and raced towards the target.  Each torpedo had a computer guidance system and was packed with enough explosives to sink an American Los Angeles-class submarine.
Sterenko watched the sonar screen over Ivanovich’s shoulder.
“The object is still moving closer,” Ivanovich cried again.  “Sixteen hundred meters… fifteen hundred meters… fourteen…”
“Five seconds to impact,” the first mate interrupted.
Exactly five seconds later, the Akula was rocked as the torpedoes detonated.  The bridge was shaken as the force of the explosion slammed against the submarine’s titanium hull.
“Direct hit!  Both torpedoes!”  Ivanovich announced before his sonar screen went white.  During the four seconds that the submarine was buffeted by the explosions, the sonar was useless.  Those seconds seemed like an eternity to Sterenko.  Finally, the sonar screen cleared.
“Captain!” Sonarman Ivanovich shouted.  “It’s still out there!  The object is still coming.  Nine hundred meters… Eight hundred…”