The explosion had occurred on the outer hull, a skin of light steel. Inside it was a water-filled ballast tank, a beehive of cellular baffles seven feet across. Located beyond the tank were high-pressure air flasks. Then came the October's battery and the inner pressure hull. The torpedo had impacted in the center of a steel plate on the outer hull, several feet from any weld joints. The force of the explosion had torn a hole twelve feet across, shredded the interior ballast tank baffles, and ruptured a half-dozen air flasks, but already much of its force had been dissipated. The final damage was done to thirty of the large nickle-cadmium battery cells. Soviet engineers had placed these here deliberately. They had known that such a placement would make them difficult to service, difficult to recharge, and worst of all expose them to seawater contamination. All this had been accepted in light of their secondary purpose as additional armor for the hull. The October's batteries saved her. Had it not been for them, the force of the explosion would have been spent on the pressure hull. Instead it was greatly reduced by the layered defensive system which had no Western counterpart. A crack had developed at the weld joint on the inner hull, and water was spraying into the radio room as though from a high-pressure hose, but the hull was otherwise secure.

In control, Ryan was soon back in his seat trying to determine if his instruments still worked. He could hear water splashing into the next compartment forward. He didn't know what to do. He did know it would be a bad time to panic, much as his brain screamed for the release.

"What do I do?"

"Still with us?" Mancuso's face looked satanic in the red lights.

"No goddammit, I'm dead—what do I do?"

"Ramius?" Mancuso saw the captain holding a flashlight taken from a bracket on the aft bulkhead.

"Down, dive for bottom." Ramius took the phone and called engineering to order the engines stopped. Melekhin had already given the order.

Ryan pushed his controls forward. In a goddamned submarine that's got a goddamned hole punched in it, they tell you to go down! he thought.

The V. K. Konovalov

"A solid hit, Comrade Captain," the michman reported. "His engines stopped. I hear hull creaking noises, his depth is changing." He tried some additional pings but got nothing. The explosion had greatly disturbed the water. There were rumbling echoes of the initial explosion reverberating through the sea. Trillions of bubbles had formed, creating an "ensonified zone" around the target that rapidly obscured it. His active pings were reflected back by the cloud of bubbles, and his passive listening ability was greatly reduced by the recurring rumbles. All he knew for sure was that one torpedo had hit, probably the second. He was an experienced man trying to decide what was noise and what was signal, and he had reconstructed most of the events correctly.