pressurized, comfortable and habitable, and so self-contained that the men could live here for months on end without returning to the world above the waves that was their natural habitat. Yet so large was the great supporting device that even these stately quarters were no larger in proportion than an egg would be balanced on the handle-bars of a bicycle, which, in some ways, the structures did resemble.
This hulking machine, entitled the Challenger Mark IV Dredger by its manufacturers, was nonetheless called Creepy by all who came into contact with it, undoubtedly because of its maximum speed of about one mile an hour. Creepy was neither creeping nor operating at the present time which was all for the best since otherwise vision would have been completely impossible, for while at work it threw up an obscuring cloud in the water denser than the finest inky defense of the largest squid alive. Its booms would then swing out and the rotating cutters, each as large as an omnibus, would crash into the ocean floor, while about them compressed streams of water tore at the silt and sand deposits of this bed. Under the attack of the water and the cutting blades the eternal floor of the ocean would be stirred and lifted—into the mouths of suction dredgers that sucked at this slurry, raised and carried it far to the side where it was spewed forth in a growing mound.
All of this agitation raised a cloud of fine particles in the water that completely obscured vision and was penetrable only by the additional application of scientific knowledge. Sound waves will travel through water, opaque or no, and the returned echoes of the sonar scanner built up a picture on the screen of events ahead in the newly dug trench. But Creepy’s work was done for the moment, its motors silent, its digging apparatus raised when it had backed away from the new trench.
Other machines now took their place upon the ocean floor. There was an ugly device with a funnel-like proboscus that spat gravel into the ditch, but this had finished as well and also backed away and the silt raised by its disturbance quickly settled. Now the final work had begun, the reason for all this subaqueous excavation. Floating downwards towards the newly-dug trench and the bed of gravel on which it was to rest was the ponderous and massive form of a preformed tunnel section. Tons of concrete and steel reinforcing rods had gone into the construction of this hundred foot section, while coat after coat of resistant epoxies covered it on the outside. Preformed and prestressed it awaited only a safe arrival to continue the ever-lengthening tunnel.
Thick cables rose from the embedded rings to the even larger flotation tank that rode above it, for it had no buoyancy of its own. The tubes that would be the operating part of the tunnel were open to the sea at both ends. Massive and unyielding it hung there, now drifting forward slowly under the buzzing pressure of four small submarines, sister vessels to the one that Washington was riding in. They exchanged signals, stopping and starting, then drifting sideways, until they were over the correct spot in the trench. Then water was admitted to the ballast tanks of the float so it dropped down slowly, setting the structure to rest on its prepared bed.
With massive precision the self-aligning joint between the sections performed its function so that when the new’section came to rest it was joined to and continuous with the last.
The subs buzzed down and the manipulating apparatus on their bows clamped hydraulic jacks over the flanges and squeezed slowly to make the two as one. Only when the rubber seals had been collapsed as far as their stops did they halt and hold fast while the locking plates were fixed in place. On the bottom other crawling machines were already waiting to put the sealing forms around the junction so the special tremie, underwater setting concrete, could be poured around the ends to join them indivisibly.
All was in
This hulking machine, entitled the Challenger Mark IV Dredger by its manufacturers, was nonetheless called Creepy by all who came into contact with it, undoubtedly because of its maximum speed of about one mile an hour. Creepy was neither creeping nor operating at the present time which was all for the best since otherwise vision would have been completely impossible, for while at work it threw up an obscuring cloud in the water denser than the finest inky defense of the largest squid alive. Its booms would then swing out and the rotating cutters, each as large as an omnibus, would crash into the ocean floor, while about them compressed streams of water tore at the silt and sand deposits of this bed. Under the attack of the water and the cutting blades the eternal floor of the ocean would be stirred and lifted—into the mouths of suction dredgers that sucked at this slurry, raised and carried it far to the side where it was spewed forth in a growing mound.
All of this agitation raised a cloud of fine particles in the water that completely obscured vision and was penetrable only by the additional application of scientific knowledge. Sound waves will travel through water, opaque or no, and the returned echoes of the sonar scanner built up a picture on the screen of events ahead in the newly dug trench. But Creepy’s work was done for the moment, its motors silent, its digging apparatus raised when it had backed away from the new trench.
Other machines now took their place upon the ocean floor. There was an ugly device with a funnel-like proboscus that spat gravel into the ditch, but this had finished as well and also backed away and the silt raised by its disturbance quickly settled. Now the final work had begun, the reason for all this subaqueous excavation. Floating downwards towards the newly-dug trench and the bed of gravel on which it was to rest was the ponderous and massive form of a preformed tunnel section. Tons of concrete and steel reinforcing rods had gone into the construction of this hundred foot section, while coat after coat of resistant epoxies covered it on the outside. Preformed and prestressed it awaited only a safe arrival to continue the ever-lengthening tunnel.
Thick cables rose from the embedded rings to the even larger flotation tank that rode above it, for it had no buoyancy of its own. The tubes that would be the operating part of the tunnel were open to the sea at both ends. Massive and unyielding it hung there, now drifting forward slowly under the buzzing pressure of four small submarines, sister vessels to the one that Washington was riding in. They exchanged signals, stopping and starting, then drifting sideways, until they were over the correct spot in the trench. Then water was admitted to the ballast tanks of the float so it dropped down slowly, setting the structure to rest on its prepared bed.
With massive precision the self-aligning joint between the sections performed its function so that when the new’section came to rest it was joined to and continuous with the last.
The subs buzzed down and the manipulating apparatus on their bows clamped hydraulic jacks over the flanges and squeezed slowly to make the two as one. Only when the rubber seals had been collapsed as far as their stops did they halt and hold fast while the locking plates were fixed in place. On the bottom other crawling machines were already waiting to put the sealing forms around the junction so the special tremie, underwater setting concrete, could be poured around the ends to join them indivisibly.
All was in
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