The “21 MC” speaker on the bridge blared: “Bridge—Control! Sounding, three five fathoms!”
“That’s it, Jim,” I said. “When you are ready in all respects, take her down.” I deliberately spoke loudly for the benefit of the lookouts who, I knew, were eagerly hoping to get an inkling of where our mysterious trip was to take us. They were to get no satisfaction from me, yet. But there would be nothing wrong with teasing them a little. I swung myself on the ladder to go below.
“Be sure you get everything tightly secured,” I said. “We’re going to be a mighty long time down before we come up, and we don’t want any of this stuff shaking loose up here where we can’t get at it!” I chuckled inwardly. In a few minutes that bit of information would be all over the ship.
As I passed down through the conning tower into the control room, everyone sensed that this time my appearance heralded the time to dive. In the control room, Chief Radioman Joe Walsh, in charge of Triton’s radio gang, was Chief of the Watch. When he saw me, he put down the cup of coffee he was holding. Slight, with blond hair and aquiline features, Walsh had been one of the first to check out on our Ballast Control Panel. It must have been Walsh who had been operating the fathometer. No one was near it at the present time. Tom Thamm stood unobtrusively in the background. To Walsh’s left stood Bob Carter, Machinist Mate First Class, Auxiliaryman of the Watch. In build and size similar to Walsh, though darker and with jet black hair, Carter might have posed for illustrations of the lanky sailor so often characterized as the ideal man-o-war’s man. Career Navymen and submariners for years, Walsh and Carter both had thoroughly checked out Triton’s complicated equipment. We were in good hands.
Noting my attention, they self-consciously pretended unconcern. Inwardly, I smiled to myself. Diving was routine; Triton had already dived many times. But this was the start of our shakedown cruise, and they sensed that something out of the ordinary was planned. That this cruise was to be no ordinary cruise, this dive no ordinary dive, everyone on board must have realized.
I gripped the handrail of the ladder beneath the conning tower hatch through which I had just descended. Without even realizing they were doing it, Walsh and Carter ran their eyes over each of the individual controls before them, mentally checking them at the proper position and reviewing what they would do when the diving alarm sounded. For a moment or two nothing happened. Jim must be making a final check of the bridge, I thought. I hoped everything was tightly secured up there. Finally, I heard his voice through the bridge speaker system. “Clear the bridge. Clear the bridge!” Simultaneously, the diving alarm—an old-fashioned automobile horn—resounded through the ship.
Walsh’s hands flew to the controls for the hydraulic plants, started the stand-by pump, then waited, with his right hand hovering near the switch to the air inlet valve. It was a similar valve which somehow failed to close in 1939, when USS Squalus sank near the Isle of Shoals off Maine, losing nearly half her crew. In Squalus, this valve had been much larger than our own, for it supplied air to four great diesel engines in the engine room, whereas in our case it only provided ventilation below decks. But it was still important that it be closed when we dived.
The horn stopped; then came a second blast. I stepped clear of the hatch, and moments later a pair of legs clattered down the ladder, followed closely by another pair. Tom Schwartz, Torpedoman’s Mate Third—known variously as “the nose,” “the face,” or “the profile”—scrambled off the ladder and threw himself into one of the seats at the diving stand. William A. McKamey, Seaman, practically on Schwartz’s heels, settled himself at the other seat.
Jim Hay, as Officer of the Deck, would be the last man off the bridge. His next duty was to see that the watertight hatch leading to the bridge was properly shut. He would be up there right now checking it.
With the second blast of the alarm, Walsh snapped the switch to shut Triton’s main air valve. Then, playing upon the Ballast Control Panel as though it were an organ console, while intently eying the board of indicator lights glowing before him, he swept his hand swiftly and precisely across the face of the panel to open the twenty-two main ballast tank vents with which Triton was fitted. That done, he remained poised, one hand on the master switch which would shut at least half of the ballast tank vents, the other on the main air blow valve control. The bridge hatch still indicated open on his panel—as it should until completely closed. This is one of the crucial operations in diving; no skipper can completely divest himself of the urgent need to know that the bridge hatch has been properly shut. As soon as McKamey had passed me. I stepped back to the ladder and looked up into the conning tower. The ordered bustle there reassured me, as it always did, and as I looked up, Beacham’s voice sang out to Hay, “Hatch secured, sir!”
I cast my eyes quickly back to Walsh. He had relaxed ever so slightly. The red circle, indicating that the conning tower hatch was open, had been replaced by a single short bar.
McKamey and Schwartz, each pulling the steel pin which had locked their control columns in the neutral position, pushed the bow and stern planes forward, positioning them to a dive angle. Approximately fifteen seconds had passed since the end of the second blast of the diving alarm, and Triton’s surface motion had already changed. Our wide open main ballast tanks had taken aboard nearly all of the two thousand tons of water they could hold—and our six-thousand-ton Triton, cruising powerfully on the surface of the sea, had become an eight-thousand-ton submarine. Her bow began to incline; Jim Hay slipped around me and took his station behind the two planesmen. The depth gauges were showing that our keel was forty feet below the surface and going deeper.
“Depth, Captain?” asked Jim, his eyes on the depth gauges.
“One hundred and fifty feet, Jim,” I told him. “Keep the fathometer going and don’t get any closer than seventy-five feet from the bottom.”
This area had been well swept by many years of submarine operations south of Montauk Point. All wrecked ships or rock outcroppings, which might present a hazard to a submarine operating close to the bottom, had been discovered and plotted. Nevertheless, and particularly at the speed we were going, it was desirable to be more than careful.
A thirty-five-fathom sounding from Triton’s fathometers indicated an actual depth of water, counting our own draft, of nearer to forty fathoms, or two hundred and forty feet. A keel depth of one hundred and fifty feet, therefore, should leave us ninety feet of water between our keel and the bottom of the sea. At this depth our periscopes could not extend to the surface, but our speed would have rendered them useless anyway. On the other hand, even if the biggest ship in the world were to pass directly overhead—though we’d probably be startled at the noise she’d be making—there would be no danger of collision. The only thing we needed to worry about at all was the possibility of encountering another submerged submarine, and this had been taken care of administratively, so far as our own subs were concerned, by assigning Triton a sea lane from which all other submarines had been excluded. There was, of course, a chance that a submarine belonging to another country might have chosen this precise moment to be submerged in this very area. But it was a remote possibility, barely worth consideration.